diff --git a/vocabularies/Common.json b/vocabularies/Common.json
index ca7c63d4..ab899fb3 100644
--- a/vocabularies/Common.json
+++ b/vocabularies/Common.json
@@ -155,8 +155,8 @@
                 "ReturnType"
             ],
             "@Common.Experimental": true,
-            "@Core.Description": "The point in time represented by the annotated property, parameter or return type shall be interpreted in the given time zone",
-            "@Core.LongDescription": "Time zones shall be specified according to the [IANA](https://www.iana.org/time-zones) standard.\n            If this annotation is absent or null, points in time are typically interpreted in the current user's or default time zone.",
+            "@Core.Description": "The point in time represented by the annotated property, parameter or return type must be interpreted in the given time zone",
+            "@Core.LongDescription": "Time zones must be specified according to the [IANA](https://www.iana.org/time-zones) standard.\n            If this annotation is absent or null, points in time are typically interpreted in the current user's or default time zone.",
             "@Core.RequiresType": "Edm.DateTimeOffset"
         },
         "Locale": {
@@ -168,8 +168,8 @@
                 "ReturnType"
             ],
             "@Common.Experimental": true,
-            "@Core.Description": "The value of the annotated property, parameter or return type shall be interpreted in the given locale",
-            "@Core.LongDescription": "Locales MUST be specified through a [Unicode Locale Identifier](https://www.unicode.org/reports/tr35/tr35.html#Identifiers).\n          If this annotation is absent or null, the current user's or default locale is used.\n          An example for the applicability of this annotation are calendar weeks, whose meaning is locale-dependent."
+            "@Core.Description": "The value of the annotated property, parameter or return type must be interpreted in the given locale",
+            "@Core.LongDescription": "Locales must be specified through a [Unicode Locale Identifier](https://www.unicode.org/reports/tr35/tr35.html#Identifiers).\n          If this annotation is absent or null, the current user's or default locale is used.\n          An example for the applicability of this annotation are calendar weeks, whose meaning is locale-dependent."
         },
         "IsDigitSequence": {
             "$Kind": "Term",
diff --git a/vocabularies/Common.md b/vocabularies/Common.md
index 5c467f10..a96ff856 100644
--- a/vocabularies/Common.md
+++ b/vocabularies/Common.md
@@ -19,8 +19,8 @@ Term|Type|Description
 [ExternalID](./Common.xml#L85:~:text=<Term%20Name="-,ExternalID,-") *([Experimental](Common.md#Experimental))*|String?|<a name="ExternalID"></a>A human readable identifier for values of the annotated property. Value MUST be a dynamic expression when used as metadata annotation.<br>If the annotated property is (part of) a foreign key of a resource, the external id is a human readable (part of an) identifier of this resource. There is a one-to-one relationship between each possible value of the annotated property and the corresponding external id.
 [IsLanguageIdentifier](./Common.xml#L99:~:text=<Term%20Name="-,IsLanguageIdentifier,-") *([Experimental](Common.md#Experimental))*|[Tag](https://github.com/oasis-tcs/odata-vocabularies/blob/main/vocabularies/Org.OData.Core.V1.md#Tag)|<a name="IsLanguageIdentifier"></a>An identifier to distinguish multiple texts in different languages for the same entity
 [TextFormat](./Common.xml#L104:~:text=<Term%20Name="-,TextFormat,-")|[TextFormatType](#TextFormatType)|<a name="TextFormat"></a>The annotated property, parameter, or return type contains human-readable text that may contain formatting information
-[Timezone](./Common.xml#L117:~:text=<Term%20Name="-,Timezone,-") *([Experimental](Common.md#Experimental))*|String?|<a name="Timezone"></a>The point in time represented by the annotated property, parameter or return type shall be interpreted in the given time zone<br>Time zones shall be specified according to the [IANA](https://www.iana.org/time-zones) standard. If this annotation is absent or null, points in time are typically interpreted in the current user's or default time zone.
-[Locale](./Common.xml#L127:~:text=<Term%20Name="-,Locale,-") *([Experimental](Common.md#Experimental))*|String?|<a name="Locale"></a>The value of the annotated property, parameter or return type shall be interpreted in the given locale<br>Locales MUST be specified through a [Unicode Locale Identifier](https://www.unicode.org/reports/tr35/tr35.html#Identifiers). If this annotation is absent or null, the current user's or default locale is used. An example for the applicability of this annotation are calendar weeks, whose meaning is locale-dependent.
+[Timezone](./Common.xml#L117:~:text=<Term%20Name="-,Timezone,-") *([Experimental](Common.md#Experimental))*|String?|<a name="Timezone"></a>The point in time represented by the annotated property, parameter or return type must be interpreted in the given time zone<br>Time zones must be specified according to the [IANA](https://www.iana.org/time-zones) standard. If this annotation is absent or null, points in time are typically interpreted in the current user's or default time zone.
+[Locale](./Common.xml#L127:~:text=<Term%20Name="-,Locale,-") *([Experimental](Common.md#Experimental))*|String?|<a name="Locale"></a>The value of the annotated property, parameter or return type must be interpreted in the given locale<br>Locales must be specified through a [Unicode Locale Identifier](https://www.unicode.org/reports/tr35/tr35.html#Identifiers). If this annotation is absent or null, the current user's or default locale is used. An example for the applicability of this annotation are calendar weeks, whose meaning is locale-dependent.
 [IsDigitSequence](./Common.xml#L183:~:text=<Term%20Name="-,IsDigitSequence,-")|[Tag](https://github.com/oasis-tcs/odata-vocabularies/blob/main/vocabularies/Org.OData.Core.V1.md#Tag)|<a name="IsDigitSequence"></a>Contains only digits
 [IsUpperCase](./Common.xml#L188:~:text=<Term%20Name="-,IsUpperCase,-")|[Tag](https://github.com/oasis-tcs/odata-vocabularies/blob/main/vocabularies/Org.OData.Core.V1.md#Tag)|<a name="IsUpperCase"></a>Contains just uppercase characters
 [IsCurrency](./Common.xml#L193:~:text=<Term%20Name="-,IsCurrency,-")|[Tag](https://github.com/oasis-tcs/odata-vocabularies/blob/main/vocabularies/Org.OData.Core.V1.md#Tag)|<a name="IsCurrency"></a>Annotated property or parameter is a currency code
diff --git a/vocabularies/Common.xml b/vocabularies/Common.xml
index b9e69e0f..5d9f24c5 100644
--- a/vocabularies/Common.xml
+++ b/vocabularies/Common.xml
@@ -116,9 +116,9 @@
 
       <Term Name="Timezone" Type="Edm.String" Nullable="true" AppliesTo="Property Parameter ReturnType">
         <Annotation Term="Common.Experimental" />
-        <Annotation Term="Core.Description" String="The point in time represented by the annotated property, parameter or return type shall be interpreted in the given time zone" />
+        <Annotation Term="Core.Description" String="The point in time represented by the annotated property, parameter or return type must be interpreted in the given time zone" />
         <Annotation Term="Core.LongDescription">
-          <String>Time zones shall be specified according to the [IANA](https://www.iana.org/time-zones) standard.
+          <String>Time zones must be specified according to the [IANA](https://www.iana.org/time-zones) standard.
             If this annotation is absent or null, points in time are typically interpreted in the current user's or default time zone.</String>
         </Annotation>
         <Annotation Term="Core.RequiresType" String="Edm.DateTimeOffset" />
@@ -126,9 +126,9 @@
 
       <Term Name="Locale" Type="Edm.String" Nullable="true" AppliesTo="Property Parameter ReturnType">
         <Annotation Term="Common.Experimental" />
-        <Annotation Term="Core.Description" String="The value of the annotated property, parameter or return type shall be interpreted in the given locale" />
+        <Annotation Term="Core.Description" String="The value of the annotated property, parameter or return type must be interpreted in the given locale" />
         <Annotation Term="Core.LongDescription">
-          <String>Locales MUST be specified through a [Unicode Locale Identifier](https://www.unicode.org/reports/tr35/tr35.html#Identifiers).
+          <String>Locales must be specified through a [Unicode Locale Identifier](https://www.unicode.org/reports/tr35/tr35.html#Identifiers).
           If this annotation is absent or null, the current user's or default locale is used.
           An example for the applicability of this annotation are calendar weeks, whose meaning is locale-dependent.</String>
         </Annotation>