diff --git a/conformance.py b/conformance.py
index b6e8895..bf94f55 100644
--- a/conformance.py
+++ b/conformance.py
@@ -10,6 +10,7 @@
 import dab.system
 import dab.output
 import dab.version
+from util.enforcement_manager import EnforcementManager
 
 # Implement the test cases for conformance test. 
 CONFORMANCE_TEST_CASE = [
@@ -119,9 +120,9 @@
     ("app-telemetry/stop",f'{{"appId": "{config.apps["youtube"]}"}}', dab.app_telemetry.stop, 200, "Conformance"),
     ("health-check/get",'{}', dab.health_check.get, 2000, "Conformance"),
     ("voice/list",'{}', dab.voice.list, 200, "Conformance"),
-    ("voice/set",f'{{"voiceSystem":{{"name":"{config.va}","enabled":true}}}}', dab.voice.set, 5000, "Conformance"),
-    ("voice/send-audio",'{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/ladygaga.wav"}',dab.voice.send_audio, 10000, "Conformance"),
-    ("voice/send-text",f'{{"requestText" : "Play lady Gaga music on YouTube", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, 10000, "Conformance"),
+    ("voice/set",f'{{"voiceSystem":{{"name":"{EnforcementManager().get_voice_assistant()}","enabled":true}}}}', dab.voice.set, 5000, "Conformance"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/ladygaga.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}',dab.voice.send_audio, 10000, "Conformance"),
+    ("voice/send-text",f'{{"requestText" : "Play lady Gaga music on YouTube", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, 10000, "Conformance With VA"),
     ("version",' {}', dab.version.default, 200, "Conformance"),
     ("system/restart",' {}', dab.system.restart, 30000, "Conformance"),
 ]
diff --git a/dab/app_telemetry.py b/dab/app_telemetry.py
index e50ae31..5003316 100644
--- a/dab/app_telemetry.py
+++ b/dab/app_telemetry.py
@@ -5,7 +5,11 @@
 
 
 def start(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_start_device_telemetry_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_start_device_telemetry_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -13,6 +17,10 @@ def start(test_result, durationInMs=0,expectedLatencyMs=0):
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
 
 def stop(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_stop_device_telemetry_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_stop_device_telemetry_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     sleep(0.1)
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
\ No newline at end of file
diff --git a/dab/applications.py b/dab/applications.py
index f7a5a97..7141865 100644
--- a/dab/applications.py
+++ b/dab/applications.py
@@ -1,10 +1,15 @@
 from time import sleep
 from schema import dab_response_validator
 from dab_tester import YesNoQuestion, Default_Validations
+from util.enforcement_manager import EnforcementManager
 import jsons
 
 def launch(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_dab_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_dab_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -13,6 +18,11 @@ def launch(test_result, durationInMs=0,expectedLatencyMs=0):
 
 def launch_with_content(test_result, durationInMs=0,expectedLatencyMs=0):
     dab_response_validator.validate_dab_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_dab_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -20,7 +30,11 @@ def launch_with_content(test_result, durationInMs=0,expectedLatencyMs=0):
     return YesNoQuestion(test_result, "App started with playback?") and Default_Validations(test_result, durationInMs, expectedLatencyMs)
     
 def exit(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_exit_application_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_exit_application_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -28,15 +42,25 @@ def exit(test_result, durationInMs=0,expectedLatencyMs=0):
     return YesNoQuestion(test_result, "App exited?") and Default_Validations(test_result, durationInMs, expectedLatencyMs)
 
 def list(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_list_applications_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_list_applications_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
+    for application in response['applications']:
+        EnforcementManager().add_supported_application(application['appId'])
     sleep(0.1)
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
 
 def get_state(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_get_application_state_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_get_application_state_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/dab/device.py b/dab/device.py
index a0caab0..036c87d 100644
--- a/dab/device.py
+++ b/dab/device.py
@@ -4,7 +4,11 @@
 import jsons
 
 def info(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_device_information_schema(test_result.response)
+    try:
+        dab_response_validator.validate_device_information_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/dab/device_telemetry.py b/dab/device_telemetry.py
index 64256c4..d8f01b0 100644
--- a/dab/device_telemetry.py
+++ b/dab/device_telemetry.py
@@ -4,7 +4,11 @@
 import jsons
 
 def start(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_start_device_telemetry_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_start_device_telemetry_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -12,7 +16,11 @@ def start(test_result, durationInMs=0,expectedLatencyMs=0):
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
 
 def stop(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_stop_device_telemetry_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_stop_device_telemetry_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/dab/health_check.py b/dab/health_check.py
index 2995e9e..46acdd4 100644
--- a/dab/health_check.py
+++ b/dab/health_check.py
@@ -4,7 +4,11 @@
 import jsons
 
 def get(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_health_check_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_health_check_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/dab/input.py b/dab/input.py
index 9a31f40..6355a0c 100644
--- a/dab/input.py
+++ b/dab/input.py
@@ -7,7 +7,11 @@ class KeyList:
     key_list = []
 
 def key_press(test_result, durationInMs=0, expectedLatencyMs=None):
-    dab_response_validator.validate_dab_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_dab_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     request = jsons.loads(test_result.request)
     response  = jsons.loads(test_result.response)
     # No list available, assuming everything is required.
@@ -28,7 +32,11 @@ def key_press(test_result, durationInMs=0, expectedLatencyMs=None):
         return YesNoQuestion(test_result, expectedLatencyMs)
 
 def long_key_press(test_result, durationInMs=0, expectedLatencyMs=None):
-    dab_response_validator.validate_dab_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_dab_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     request = jsons.loads(test_result.request)
     response  = jsons.loads(test_result.response)
     # No list available, assuming everything is required.
@@ -50,7 +58,11 @@ def long_key_press(test_result, durationInMs=0, expectedLatencyMs=None):
         return YesNoQuestion(test_result, expectedLatencyMs)
 
 def list(test_result, durationInMs=0, expectedLatencyMs=0):
-    dab_response_validator.validate_key_list_schema(test_result.response)
+    try:
+        dab_response_validator.validate_key_list_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/dab/operations.py b/dab/operations.py
index 4e052c4..c19e854 100644
--- a/dab/operations.py
+++ b/dab/operations.py
@@ -2,11 +2,18 @@
 from time import sleep
 from dab_tester import YesNoQuestion, Default_Validations
 import jsons
+from util.enforcement_manager import EnforcementManager
 
 def list(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_list_supported_operation_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_list_supported_operation_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
+    for operation in response['operations']:
+        EnforcementManager().add_supported_operation(operation)
     sleep(0.1)
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
diff --git a/dab/output.py b/dab/output.py
index 63467ff..4fb8878 100644
--- a/dab/output.py
+++ b/dab/output.py
@@ -4,7 +4,11 @@
 import jsons
 
 def image(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_output_image_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_output_image_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/dab/system.py b/dab/system.py
index b6dab40..de19535 100644
--- a/dab/system.py
+++ b/dab/system.py
@@ -2,9 +2,14 @@
 from dab_tester import YesNoQuestion, Default_Validations
 import jsons
 from schema import dab_response_validator
+from util.enforcement_manager import EnforcementManager
 
 def restart(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_dab_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_dab_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -13,7 +18,11 @@ def restart(test_result, durationInMs=0,expectedLatencyMs=0):
     return YesNoQuestion(test_result, "Cobalt re-started?")
 
 def get(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_get_system_settings_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_get_system_settings_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -21,16 +30,30 @@ def get(test_result, durationInMs=0,expectedLatencyMs=0):
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
 
 def set(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_set_system_settings_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_set_system_settings_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
+    request = jsons.loads(test_result.request)
+    for setting in request:
+        if not EnforcementManager().is_setting_supported(setting):
+            if response['status'] != 501:
+                return False
     if response['status'] != 200:
         return False
     sleep(0.1)
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
 
 def list(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_list_system_settings_schema(test_result.response)
+    try:
+        dab_response_validator.validate_list_system_settings_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
+    EnforcementManager().set_supported_settings(response)
     if response['status'] != 200:
         return False
     sleep(0.1)
diff --git a/dab/version.py b/dab/version.py
index 3402eda..3c9b2d8 100644
--- a/dab/version.py
+++ b/dab/version.py
@@ -4,7 +4,11 @@
 import jsons
 
 def default(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_version_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_version_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/dab/voice.py b/dab/voice.py
index 9331bc2..e3a8606 100644
--- a/dab/voice.py
+++ b/dab/voice.py
@@ -2,9 +2,14 @@
 from time import sleep
 from dab_tester import YesNoQuestion, Default_Validations
 import jsons
+from util.enforcement_manager import EnforcementManager
 
 def send_audio(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_dab_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_dab_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -15,7 +20,11 @@ def send_audio(test_result, durationInMs=0,expectedLatencyMs=0):
         return YesNoQuestion(test_result, expectedLatencyMs)
 
 def send_text(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_dab_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_dab_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
@@ -26,15 +35,24 @@ def send_text(test_result, durationInMs=0,expectedLatencyMs=0):
         return YesNoQuestion(test_result, expectedLatencyMs)
 
 def list(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_list_voice_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_list_voice_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
+    EnforcementManager().add_supported_voice_assistant(response.voiceSystems)
     sleep(0.1)
     return Default_Validations(test_result, durationInMs, expectedLatencyMs)
 
 def set(test_result, durationInMs=0,expectedLatencyMs=0):
-    dab_response_validator.validate_set_voice_system_response_schema(test_result.response)
+    try:
+        dab_response_validator.validate_set_voice_system_response_schema(test_result.response)
+    except Exception as error:
+        print("Schema error:", error)
+        return False
     response  = jsons.loads(test_result.response)
     if response['status'] != 200:
         return False
diff --git a/end_to_end_cobalt.py b/end_to_end_cobalt.py
index 7792a91..7da95ab 100644
--- a/end_to_end_cobalt.py
+++ b/end_to_end_cobalt.py
@@ -3,10 +3,12 @@
 import dab.input
 import dab.voice
 import config
+from util.enforcement_manager import EnforcementManager
 
 # Voice action steps
 END_TO_END_TEST_CASE = [
-    ("voice/send-text",'{"requestText" : "Play lady Gaga music on YouTube", "voiceSystem": "Alexa"}', dab.voice.send_text, "Are you on search page with Lady Gaga?", "End to end launch"),
+    ("voice/list",'{}', dab.voice.list, 200, "Voice List"),
+    ("voice/send-text",f'{{"requestText" : "Play lady Gaga music on YouTube", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Are you on search page with Lady Gaga?", "End to end launch"),
     ("input/key-press",'{"keyCode": "KEY_ENTER"}', dab.input.key_press, "Is video playing?", "End to end key press Enter"),
     ("input/long-key-press",'{"keyCode": "KEY_VOLUME_UP", "durationMs": 3000}', dab.input.long_key_press, "Is volume going up?", "End to end volume up"),
     ("input/long-key-press",'{"keyCode": "KEY_VOLUME_DOWN", "durationMs": 2000}', dab.input.long_key_press, "Is volume going down?", "End to End volume down"),
diff --git a/requirements.txt b/requirements.txt
index 584b33c..225ea45 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,5 @@ paho-mqtt == 1.6.1
 readchar
 FileCache
 jsons
-jsonschema
\ No newline at end of file
+jsonschema
+singleton_decorator
\ No newline at end of file
diff --git a/schema.py b/schema.py
index 1713500..28f3b2f 100644
--- a/schema.py
+++ b/schema.py
@@ -273,55 +273,75 @@
                  "audioOutputSource", "videoInputSource", "audioVolume", "mute", "textToSpeech"]
 }
 
+system_settings_schema = {
+    "language": {"type": "string"},
+    "outputResolution": output_resolution_schema,
+    "memc": {"type": "boolean"},
+    "cec": {"type": "boolean"},
+    "lowLatencyMode": {"type": "boolean"},
+    "matchContentFrameRate": {"type": "string"},
+    "hdrOutputMode": {"type": "string"},
+    "pictureMode": {"type": "string"},
+    "audioOutputMode": {"type": "string"},
+    "audioOutputSource": {"type": "string"},
+    "videoInputSource": {"type": "string"},
+    "audioVolume": {"type": "integer"},
+    "mute": {"type": "boolean"},
+    "textToSpeech": {"type": "boolean"},
+}
+
 # Operation: system/settings/get
 # GetSystemSettingsResponse
 get_system_settings_response_schema = {
     "type": "object",
     "properties": {
-        "status": {"type": "integer"},
-        "error": {"type": ["string", "null"]},
-        "language": {"type": "string"},
-        "outputResolution": output_resolution_schema,
-        "memc": {"type": "boolean"},
-        "cec": {"type": "boolean"},
-        "lowLatencyMode": {"type": "boolean"},
-        "matchContentFrameRate": {"type": "string"},
-        "hdrOutputMode": {"type": "string"},
-        "pictureMode": {"type": "string"},
-        "audioOutputMode": {"type": "string"},
-        "audioOutputSource": {"type": "string"},
-        "videoInputSource": {"type": "string"},
-        "audioVolume": {"type": "integer"},
-        "mute": {"type": "boolean"},
-        "textToSpeech": {"type": "boolean"},
+        "status": {"type": "integer"}
     },
-    "required": ["status", "language", "outputResolution", "memc", "cec", "lowLatencyMode",
-                 "matchContentFrameRate", "hdrOutputMode", "pictureMode", "audioOutputMode",
-                 "audioOutputSource", "videoInputSource", "audioVolume", "mute", "textToSpeech"]
+    "required": ["status"],
+
+    "if": {
+        "properties": {
+            "status": { "const": 200 }
+        }
+    },
+    "then": {
+        "properties": system_settings_schema,
+        "required": list(system_settings_schema.keys())
+    },
+    "else": {
+        "properties": {
+            "error": {"type": ["string", "null"]}
+        },
+        "required": ["error"]
+    },
+
+    "unevaluatedProperties": False
 }
 
 # SetSystemSettingsResponse
 set_system_settings_response_schema = {
     "type": "object",
     "properties": {
-        "status": {"type": "integer"},
-        "error": {"type": ["string", "null"]},
-        "language": {"type": "string"},
-        "outputResolution": output_resolution_schema,
-        "memc": {"type": "boolean"},
-        "cec": {"type": "boolean"},
-        "lowLatencyMode": {"type": "boolean"},
-        "matchContentFrameRate": {"type": "string"},
-        "hdrOutputMode": {"type": "string"},
-        "pictureMode": {"type": "string"},
-        "audioOutputMode": {"type": "string"},
-        "audioOutputSource": {"type": "string"},
-        "videoInputSource": {"type": "string"},
-        "audioVolume": {"type": "integer"},
-        "mute": {"type": "boolean"},
-        "textToSpeech": {"type": "boolean"},
+        "status": {"type": "integer"}
     },
-    "required": ["status"]
+    "required": ["status"],
+
+    "if": {
+        "properties": {
+            "status": { "const": 200 }
+        }
+    },
+    "then": {
+        "properties": system_settings_schema
+    },
+    "else": {
+        "properties": {
+            "error": {"type": ["string", "null"]}
+        },
+        "required": ["error"]
+    },
+
+    "unevaluatedProperties": False
 }
 
 # Operation: input/key/list
diff --git a/util/enforcement_manager.py b/util/enforcement_manager.py
new file mode 100644
index 0000000..fbdd039
--- /dev/null
+++ b/util/enforcement_manager.py
@@ -0,0 +1,83 @@
+from singleton_decorator import singleton
+from typing import List
+
+class Resolution:
+    width: int
+    height: int
+    frequency: int
+
+class Settings:
+    status: int
+    language: List[str]
+    outputResolution: List[Resolution]
+    memc: bool
+    cec: bool
+    lowLatencyMode: bool
+    matchContentFrameRate: List[str]
+    hdrOutputMode: List[str]
+    pictureMode: List[str]
+    audioOutputMode: List[str]
+    audioOutputSource: List[str]
+    videoInputSource: List[str]
+    audioVolume: bool
+    mute: bool
+    textToSpeech: bool
+
+@singleton
+class EnforcementManager:
+    def __init__(self):
+        self.supported_operations = set()
+        self.supported_keys = set()
+        self.supported_voice_assistants = set()
+        self.supported_settings = None
+        self.supported_applications = set()
+
+    def add_supported_operation(self, operation):
+        self.supported_operations.add(operation)
+
+    def is_operation_supported(self, operation):
+        return not self.supported_operations or operation in self.supported_operations
+    
+    def add_supported_key(self, key):
+        self.supported_keys.add(key)
+
+    def is_key_supported(self, key):
+        return not self.supported_keys or key in self.supported_keys
+    
+    def add_supported_voice_assistant(self, voice_assistant):
+        self.supported_voice_assistants.add(voice_assistant)
+
+    def is_voice_assistant_supported(self, voice_assistant):
+        return not self.supported_voice_assistants or voice_assistant in self.supported_voice_assistants
+    
+    def get_voice_assistant(self):
+        return "AmazonAlexa" if len(self.supported_voice_assistants) == 0 else self.supported_voice_assistants[0]
+    
+    def set_supported_settings(self, settings):
+        self.supported_settings = settings
+
+    def is_setting_supported(self, setting):
+        """
+        Checks if a setting is supported by the target.
+
+        Args:
+            setting: The name of the setting.
+
+        Returns:
+            True if the setting is supported, False otherwise.
+        """
+
+        if not self.supported_settings:
+            return True
+
+        if isinstance(self.supported_settings.get(setting), List) and len(self.supported_settings.get(setting)) == 0:
+            return True
+
+        if isinstance(self.supported_settings.get(setting), bool) and self.supported_settings.get(setting):
+            return True
+    
+    def add_supported_application(self, application):
+        self.supported_applications.add(application)
+
+    def is_application_supported(self, application):
+        return not self.supported_applications or application in self.supported_applications
\ No newline at end of file
diff --git a/voice_audio.py b/voice_audio.py
index f2bd49d..60c92ea 100644
--- a/voice_audio.py
+++ b/voice_audio.py
@@ -1,17 +1,18 @@
 import dab.applications
 import dab.system
 import dab.voice
-import config
+from util.enforcement_manager import EnforcementManager
 
 # Voice action steps
 SEND_VOICE_AUDIO_TEST_CASES = [
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/ladygaga.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Are you on search page with Lady Gaga?", "Voice launch Lady gaga"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/pressenter.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Is video playing?", "Voice play video"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/playvideo.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "If video was not playing, is it playing now?", "Voice resume video"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/setvolume0.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Did volume of the video changed?", "voice mute"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/setvolume5.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Did volume of the video changed?", "voice volume up"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/pausevideo.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Did video paused?", "voice pause"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/fastforwardvideo.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Did video playback fast forward?", "voice fastforward"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/rewindvideo.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Did video playback rewind?", "voice rewind"),
-    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/exittomainmenu.wav", "voiceSystem": "{config.va}"}}', dab.voice.send_audio, "Are you on main menu?", "voice exit"),
-]
+    ("voice/list",'{}', dab.voice.list, 200, "Voice List"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/ladygaga.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Are you on search page with Lady Gaga?", "Voice launch Lady gaga"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/pressenter.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Is video playing?", "Voice play video"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/playvideo.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "If video was not playing, is it playing now?", "Voice resume video"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/setvolume0.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Did volume of the video changed?", "voice mute"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/setvolume5.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Did volume of the video changed?", "voice volume up"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/pausevideo.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Did video paused?", "voice pause"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/fastforwardvideo.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Did video playback fast forward?", "voice fastforward"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/rewindvideo.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Did video playback rewind?", "voice rewind"),
+    ("voice/send-audio",f'{{"fileLocation": "https://storage.googleapis.com/ytlr-cert.appspot.com/voice/exittomainmenu.wav", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_audio, "Are you on main menu?", "voice exit"),
+]
\ No newline at end of file
diff --git a/voice_text.py b/voice_text.py
index 5c5479f..6e6646a 100644
--- a/voice_text.py
+++ b/voice_text.py
@@ -1,17 +1,18 @@
 import dab.applications
 import dab.system
 import dab.voice
-import config
+from util.enforcement_manager import EnforcementManager
 
 # Voice action steps
 SEND_VOICE_TEXT_TEST_CASES = [
-    ("voice/send-text", f'{{"requestText" : "Play lady Gaga music on YouTube", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Are you on search page with Lady Gaga?", "Voice launch Lady gaga"),
-    ("voice/send-text", f'{{"requestText" : "Press enter", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Is video playing?", "Voice play video"),
-    ("voice/send-text", f'{{"requestText" : "Play video", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "If video was not playing, is it playing now?", "Voice resume video"),
-    ("voice/send-text", f'{{"requestText" : "Set volume 0", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Did volume of the video changed?", "voice mute"),
-    ("voice/send-text", f'{{"requestText" : "Set volume 5", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Did volume of the video changed?", "voice volume up"),
-    ("voice/send-text", f'{{"requestText" : "Pause Video", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Did video paused?", "voice pause"),
-    ("voice/send-text", f'{{"requestText" : "Fast forward video", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Did video playback fast forward?", "voice fastforward"),
-    ("voice/send-text", f'{{"requestText" : "Rewind video", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Did video playback rewind?", "voice rewind"),
-    ("voice/send-text", f'{{"requestText" : "Exit to main menu", "voiceSystem" : "{config.va}"}}', dab.voice.send_text, "Are you on main menu?", "voice exit"),
+    ("voice/list",'{}', dab.voice.list, 200, "Voice List"),
+    ("voice/send-text",f'{{"requestText" : "Play lady Gaga music on YouTube", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Are you on search page with Lady Gaga?", "Voice launch Lady gaga"),
+    ("voice/send-text",f'{{"requestText" : "Press enter", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Is video playing?", "Voice play video"),
+    ("voice/send-text",f'{{"requestText" : "Play video", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "If video was not playing, is it playing now?", "Voice resume video"),
+    ("voice/send-text",f'{{"requestText" : "Set volume 0", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Did volume of the video changed?", "voice mute"),
+    ("voice/send-text",f'{{"requestText" : "Set volume 5", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Did volume of the video changed?", "voice volume up"),
+    ("voice/send-text",f'{{"requestText" : "Pause Video", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Did video paused?", "voice pause"),
+    ("voice/send-text",f'{{"requestText" : "Fast forward video", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Did video playback fast forward?", "voice fastforward"),
+    ("voice/send-text",f'{{"requestText" : "Rewind video", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Did video playback rewind?", "voice rewind"),
+    ("voice/send-text",f'{{"requestText" : "Exit to main menu", "voiceSystem": "{EnforcementManager().get_voice_assistant()}"}}', dab.voice.send_text, "Are you on main menu?", "voice exit"),
 ]
\ No newline at end of file