diff --git a/xsd/netex_part_3/part3_fares/netex_accessRightParameter_support.xsd b/xsd/netex_part_3/part3_fares/netex_accessRightParameter_support.xsd
index 2ce288a11..5e6928760 100644
--- a/xsd/netex_part_3/part3_fares/netex_accessRightParameter_support.xsd
+++ b/xsd/netex_part_3/part3_fares/netex_accessRightParameter_support.xsd
@@ -107,6 +107,21 @@ Rail transport, Roads and Road transport
 			<xsd:enumeration value="other"/>
 		</xsd:restriction>
 	</xsd:simpleType>
+	<xsd:simpleType name="ContextTypeEnumeration">
+		<xsd:annotation>
+			<xsd:documentation>Allowed values for ContextType</xsd:documentation>
+		</xsd:annotation>
+		<xsd:restriction base="xsd:normalizedString"> 
+			<xsd:enumeration value="offering"/>
+			<xsd:enumeration value="booking"/>
+			<xsd:enumeration value="reservation"/>
+			<xsd:enumeration value="sale"/>
+			<xsd:enumeration value="fulfilment"/>
+			<xsd:enumeration value="activation"/>
+			<xsd:enumeration value="consumption"/>
+			<xsd:enumeration value="revalidation"/> 
+		</xsd:restriction>
+	</xsd:simpleType>
 	<!-- === VALIDITY PARAMETER====================================================== -->
 	<xsd:simpleType name="ValidityParameterAssignmentIdType">
 		<xsd:annotation>
diff --git a/xsd/netex_part_3/part3_fares/netex_accessRightParameter_version.xsd b/xsd/netex_part_3/part3_fares/netex_accessRightParameter_version.xsd
index a510fd8a0..e0a7e7c31 100644
--- a/xsd/netex_part_3/part3_fares/netex_accessRightParameter_version.xsd
+++ b/xsd/netex_part_3/part3_fares/netex_accessRightParameter_version.xsd
@@ -101,6 +101,9 @@
 				<Date>
 					<Modified>2021-01-25</Modified>Add GroupOfTariffZonesRef to NetworkValidityParametersGroup
 				</Date>
+				<Date>
+					<Modified>2021-11-03</Modified>Add SpecificationRequirementGroup to GenericParameterAssignment
+				</Date>
 				<Description>
 					<p>NeTEx is a European CEN standard for the exchange of Public Transport data including timetables.</p>
 					<p>This sub-schema describes the FARE ACCESS RIGHT PARAMETER types.</p>
@@ -725,6 +728,9 @@ Rail transport, Roads and Road transport
 						<xsd:sequence>
 							<xsd:group ref="GenericParameterAssignmentGroup"/>
 						</xsd:sequence>
+						<xsd:sequence>
+							<xsd:group ref="SpecificationRequirementGroup"/>
+						</xsd:sequence>
 					</xsd:sequence>
 					<xsd:attribute name="id" type="GenericParameterAssignmentIdType"/>
 				</xsd:restriction>
@@ -739,6 +745,7 @@ Rail transport, Roads and Road transport
 			<xsd:extension base="ValidityParameterAssignment_VersionStructure">
 				<xsd:sequence>
 					<xsd:group ref="GenericParameterAssignmentGroup"/>
+					<xsd:group ref="SpecificationRequirementGroup"/>
 				</xsd:sequence>
 			</xsd:extension>
 		</xsd:complexContent>
@@ -772,6 +779,37 @@ Rail transport, Roads and Road transport
 			</xsd:element>
 		</xsd:sequence>
 	</xsd:group>
+	<xsd:group name="SpecificationRequirementGroup">
+		<xsd:annotation>
+			<xsd:documentation>Elements for describing required information</xsd:documentation>
+		</xsd:annotation>
+		<xsd:sequence>
+			<xsd:element name="RequiredType" type="NameOfClass" minOccurs="0">
+				<xsd:annotation>
+					<xsd:documentation>Type of class that must be specified.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element name="requiredElements" type="ListOfRequiredElements" minOccurs="0">
+				<xsd:annotation>
+					<xsd:documentation>List of elements that must be specified.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+			<xsd:element name="RequiredInContext" type="ContextTypeEnumeration" minOccurs="0">
+				<xsd:annotation>
+					<xsd:documentation>The context in which the validity parameter assignment must be made specific by specifying the required type.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+	</xsd:group>
+	<xsd:complexType name="ListOfRequiredElements">
+		<xsd:sequence>
+			<xsd:element name="RequiredElement" type="xsd:NCName" maxOccurs="unbounded">
+				<xsd:annotation>
+					<xsd:documentation>Name of element that must be specified.</xsd:documentation>
+				</xsd:annotation>
+			</xsd:element>
+		</xsd:sequence>
+	</xsd:complexType>
 	<xsd:element name="GenericParameterAssignmentInContext" abstract="false" substitutionGroup="AccessRightParameterAssignment_">
 		<xsd:annotation>
 			<xsd:documentation>Optimisation: Can be used without id constraintA VALIDITY PARAMETER ASSIGNMENT specifying practical parameters during a TRAVEL GenericATION, within a given fare structure (e.g. the origin or destination zone in a zone-counting system).</xsd:documentation>