diff --git a/CHANGELOG.md b/CHANGELOG.md
index 54bbe47..9ba06be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - manipulation GetMetricDeterminationMode for metrics
+- manipulation SetActiveModeOfOperation for metrics
 - manipulation PhysicallyDisconnectRemovableSubsystemAfterSettingActivationStateOnOrStndBy
 - manipulation RequestIndicationOfNextCalibrationTimeRequired for devices
 - manipulation IndicateTimeOfNextCalibrationToUser for devices
@@ -19,6 +20,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - manipulation ProvideInformationAboutLastCalibration for devices
 - manipulation ProvideInformationAboutNextCalibration for devices
 - manipulation SetSystemContextActivationStateAndContextAssociation for combined settings
+- manipulation SetMdsUiLanguage for devices
+- manipulation GetMdsUiSupportedLanguages for devices
+- manipulation InsertContainmentTreeEntryForSequenceId for devices
 
 ## [4.1.0] - 2024-02-22
 
diff --git a/src/t2iapi/device/device_requests.proto b/src/t2iapi/device/device_requests.proto
index 7a4c2c5..2cebbc0 100644
--- a/src/t2iapi/device/device_requests.proto
+++ b/src/t2iapi/device/device_requests.proto
@@ -36,6 +36,15 @@ message SetLanguageRequest {
     string language = 1;  // the language to set as specified by RFC5646, e.g. en-US
 }
 
+/*
+Request to set the language of the component with a UI represented by the MDS to the given language.
+ */
+message SetMdsUiLanguageRequest {
+    string handle = 1;    // pm:MdsDescriptor/@Handle representing the component with a UI for which the language
+                          // shall be set
+    string language = 2;  // the language to set as specified by RFC5646, e.g. en-US
+}
+
 /*
 Request a list of removable descriptors of the given class.
  */
@@ -85,3 +94,13 @@ message ProvideInformationAboutNextCalibrationRequest {
     CalibrationState calibration_state = 2;     // ComponentCalibrationState value to set as the next calibration
                                                 // information
 }
+
+/*
+Request to make available the BICEPS CONTAINMENT TREE ENTRY (as defined in IEEE Std 11073-10700-2022) that was
+previously represented by the descriptor with the provided handle in the device's MDIB in the provided @SequenceId.
+ */
+message InsertContainmentTreeEntryForSequenceIdRequest {
+    string handle = 1;      // descriptor handle which represented the BICEPS CONTAINMENT TREE ENTRY
+    string sequence_id = 2; // @SequenceId of the devices MDIB where the requested BICEPS CONTAINMENT TREE ENTRY
+                            // was seen
+}
diff --git a/src/t2iapi/device/device_responses.proto b/src/t2iapi/device/device_responses.proto
index 7791096..68fb686 100644
--- a/src/t2iapi/device/device_responses.proto
+++ b/src/t2iapi/device/device_responses.proto
@@ -15,6 +15,15 @@ import "t2iapi/biceps/metadata.proto";
 option java_package = "com.draeger.medical.t2iapi.device";
 option java_outer_classname = "DeviceResponses";
 
+/*
+Response containing all languages supported by the UI component represented by an MDS.
+ */
+message GetMdsUiSupportedLanguagesResponse {
+    BasicResponse status = 1;
+    repeated string languages = 2;  // list of languages as specified by RFC5646 which are supported by the
+                                    // UI component represented by an MDS
+}
+
 /*
 Response which contains all descriptor handles that can be removed and reinserted into the MDIB of the device.
  */
@@ -54,3 +63,13 @@ message GetComponentHwVersionResponse {
     BasicResponse status = 1;    // status of the rpc
     string hardware_version = 2; // Hardware version of the requested device component
 }
+
+/*
+Response containing the descriptor handle which is representing the requested
+BICEPS CONTAINMENT TREE ENTRY (as defined in IEEE Std 11073-10700-2022) in the device's current MDIB.
+ */
+message InsertContainmentTreeEntryForSequenceIdResponse{
+    BasicResponse status = 1;   // status of the rpc
+    string handle = 2;          // descriptor handle which is representing the requested BICEPS CONTAINMENT TREE ENTRY
+                                // in the device's current MDIB
+}
diff --git a/src/t2iapi/device/service.proto b/src/t2iapi/device/service.proto
index 6a14d69..5a5dbe7 100644
--- a/src/t2iapi/device/service.proto
+++ b/src/t2iapi/device/service.proto
@@ -52,6 +52,18 @@ service DeviceService {
      */
     rpc SetLanguage (t2iapi.device.SetLanguageRequest) returns (BasicResponse);
 
+    /*
+    Set the language of the component with a UI represented by the MDS to the given language.
+    The manipulated state shall be persistent until a next manipulation call. If the device is not able to maintain
+    the static state, it shall return RESULT_NOT_SUPPORTED.
+    */
+    rpc SetMdsUiLanguage (t2iapi.device.SetMdsUiLanguageRequest) returns (BasicResponse);
+
+    /*
+    Get all supported languages of the component with a UI represented by the MDS with the provided handle.
+    */
+    rpc GetMdsUiSupportedLanguages (t2iapi.BasicHandleRequest) returns (GetMdsUiSupportedLanguagesResponse);
+
     /*
     Get all descriptor handles which can be removed and reinserted into the MDIB of the device
     and whose descriptors are of the given class.
@@ -128,7 +140,7 @@ service DeviceService {
      */
     rpc ProvideInformationAboutLastCalibration (t2iapi.device.ProvideInformationAboutLastCalibrationRequest)
         returns (BasicResponse);
- 
+
      /*
     Provide information about the pm:NextCalibration for the given pm:AbstractDeviceComponentDescriptor.
     If the device is not able to provide the information, it shall return RESULT_NOT_SUPPORTED.
@@ -170,4 +182,44 @@ service DeviceService {
      */
     rpc IndicateTimeOfNextCalibrationToUser (BasicHandleRequest)
         returns (BasicResponse);
+
+    /*
+    Make available the BICEPS CONTAINMENT TREE ENTRY (as defined in IEEE Std 11073-10700-2022) that was previously
+    represented by the provided handle in the MDIB with the provided @SequenceId. If the BICEPS CONTAINMENT TREE ENTRY
+    is absent in the current MDIB, it shall be inserted and its handle in the current MDIB shall be returned.
+    If the BICEPS CONTAINMENT TREE ENTRY is already present in the current MDIB, only its handle shall be returned,
+    no further action is required.
+
+    Hint: Devices which use static handles for descriptors do not have to look up the entity that was previously
+    represented by the requested handle, since they stay the same between the changes of the @SequenceId. It is
+    sufficient to ensure the descriptor is present and return the handle.
+
+    Example 1: returning the same handle for the Metric
+    - device presented an MDIB with the Metric handle "metric_1" in @SequenceID "123"
+    - device changes @SequenceID to "789" and presents a new MDIB
+    - metric with the handle "metric_1" is still present in the current MDIB and represents the *same* metric
+      as in @SequenceID "123"
+    - InsertContainmentTreeEntryForSequenceId with handle="metric_1" and sequence_id="123" is executed
+    - the handle "metric_1" is returned as the descriptor with this handle it is still available in the current MDIB
+    - no further action from the device is required
+
+    Example 2: returning a new handle for the MDS:
+    - device presented an MDIB with MDS handle "mds0" in @SequenceID "123"
+    - device changes @SequenceID to "789" and presents a new MDIB
+    - MDS which had the Handle "mds0" in @SequenceId "123" is still present in the current MDIB, but it's Handle
+      changed to "mds10"
+    - InsertContainmentTreeEntryForSequenceId with handle="mds0" and sequence_id="123" is executed
+    - the handle "mds10" is returned as the descriptor handle for that MDS has changed
+    - no further action from the device is required
+
+    Example 3: inserting the Channel into the current MDIB and returning the (new) handle:
+    - device presented the Channel with handle "channel123" in @SequenceID "123"
+    - device changes @SequenceID to "789" and presents a new MDIB
+    - Channel which had the Handle "channel123" in @SequenceId "123" is no longer present in the current MDIB
+    - InsertContainmentTreeEntryForSequenceId with handle="channel123" and sequence_id="123" is executed
+    - Channel is inserted into the device's current MDIB with the handle "channel789"
+    - the handle "channel789" is returned
+    */
+    rpc InsertContainmentTreeEntryForSequenceId (InsertContainmentTreeEntryForSequenceIdRequest)
+        returns (InsertContainmentTreeEntryForSequenceIdResponse);
 }
diff --git a/src/t2iapi/metric/service.proto b/src/t2iapi/metric/service.proto
index dad7b06..fb82c75 100644
--- a/src/t2iapi/metric/service.proto
+++ b/src/t2iapi/metric/service.proto
@@ -112,6 +112,15 @@ service MetricService {
   rpc ConveyMetricDemoValues (BasicHandleRequest)
       returns (BasicResponse);
 
+  /*
+  The metric with the given handle shall be set to an active MODE OF OPERATION if it is representing a
+  MODE OF OPERATION. If the metric does not represent a MODE OF OPERATION, it shall return RESULT_NOT_SUPPORTED.
+
+  Hint: MODE OF OPERATION is defined in the standard 11073-10701-2022 and more details in chapter 6.2.1.
+   */
+  rpc SetActiveModeOfOperation (BasicHandleRequest)
+      returns (BasicResponse);
+
   /*
   Requests if the given metric handle is determined episodically or periodically.
    */