diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 3789b99..493dd46 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -1,10 +1,13 @@
 ## Code List 
 <!-- Leave only the code list recommendation this PR is related to                      -->
+[Recommendation No. 20 Codes for Units of Measure Used in International Trade](https://github.com/uncefact/vocab-codes/tree/main/CLR/Rec20) 
+[Recommendation No. 21 Codes for Passengers, Types of Cargo, Packages and Packaging Materials](https://github.com/uncefact/vocab-codes/tree/main/CLR/Rec21) 
+[Recommendation No. 23 Freight Cost Code (FCC)](https://github.com/uncefact/vocab-codes/tree/main/CLR/Rec23) 
 [Recommendation No. 24 Trade and Transport Status Codes](https://github.com/uncefact/vocab-codes/tree/main/CLR/Rec24) 
 [Recommendation No. 28 Codes for Types of Means of Transport](https://github.com/uncefact/vocab-codes/tree/main/CLR/Rec28) 
 
 ## Maintenance Request issue
-<!--- Specify the GitHub issue number with original Maintenance Request after '#'  -->
+<!--- Specify the GitHub issue(s) number with original Maintenance Request after '#'  -->
 Ref #{issue_number}
 
 ### Mentions:
diff --git a/CLR/Rec20/csv_to_json.py b/CLR/Rec20/csv_to_json.py
new file mode 100644
index 0000000..a94be37
--- /dev/null
+++ b/CLR/Rec20/csv_to_json.py
@@ -0,0 +1,32 @@
+import csv 
+import json 
+
+def csv_to_json(csvFilePath, jsonFilePath):
+    data = {}
+    data["label"] = "Recommendation Code List 20"
+    data["uri"] = "rec20"
+    data["comment"] = "CODES FOR UNITS OF MEASURE USED IN INTERNATIONAL TRADE"
+    values = []
+      
+    #read csv file
+    with open(csvFilePath, encoding='utf-8') as csvf: 
+        #load csv file data using csv library's dictionary reader
+        csvReader = csv.DictReader(csvf) 
+
+        #convert each csv row into python dict
+        for row in csvReader: 
+            #add this python dict to json array
+            row["uri"] = "unece:rec20#"+row["CommonCode"]
+            values.append(row)
+    
+    data["values"] = values
+    data["referencedBy"] = []
+  
+    #convert python jsonArray to JSON String and write to file
+    with open(jsonFilePath, 'w', encoding='utf-8') as jsonf: 
+        jsonString = json.dumps(data, indent=4)
+        jsonf.write(jsonString)
+          
+csvFilePath = r'current/Annex || & Annex |||/code-list.csv'
+jsonFilePath = r'current/rec20.json'
+csv_to_json(csvFilePath, jsonFilePath)
\ No newline at end of file
diff --git a/CLR/Rec20/current/Annex || & Annex |||/code-list.csv b/CLR/Rec20/current/Annex || & Annex |||/code-list.csv
index 8f9bbb6..0bb67d0 100644
--- a/CLR/Rec20/current/Annex || & Annex |||/code-list.csv	
+++ b/CLR/Rec20/current/Annex || & Annex |||/code-list.csv	
@@ -1,4 +1,4 @@
-Status,"CommonCode",Name,Description,"Level/Category",Symbol,ConversionFactor
+Status,"CommonCode",Name,Description,"LevelCategory",Symbol,ConversionFactor
 X,05,lift,,3.9,,
 X,06,small spray,,3.9,,
 X,08,heat lot,,3.9,,
diff --git a/CLR/Rec21/current/code-list.csv b/CLR/Rec21/current/code-list.csv
index 52d66b3..38c3a7c 100644
--- a/CLR/Rec21/current/code-list.csv
+++ b/CLR/Rec21/current/code-list.csv
@@ -1,4 +1,4 @@
-Status,Code,Name,Description,Numeric code
+Status,Code,Name,Description,NumericCode
 ,1A,"Drum, steel",,34
 ,1B,"Drum, aluminium",,34
 ,1D,"Drum, plywood",,34
diff --git a/CLR/Rec23/current/code-list.csv b/CLR/Rec23/current/code-list.csv
index aea0c81..7b8ef62 100644
--- a/CLR/Rec23/current/code-list.csv
+++ b/CLR/Rec23/current/code-list.csv
@@ -1,4 +1,4 @@
-CI,Group,Subgroup,Detail,Description,Mode/Site Indicator,Duplicate Indicator
+CI,Group,Subgroup,Detail,Description,ModeSiteIndicator,DuplicateIndicator
 ,1,00,000,    FREIGHT CHARGES,,
 ,1,00,999,All freight charges,,
 ,1,01,000,  BASIC FREIGHT,,