diff --git a/103221-1/TS_103_221_01.xsd b/103221-1/TS_103_221_01.xsd
index 2cf5206327d992c5f46c749e1cbc4b176f61e05b..061e5777497e3c7942dcc3f7acdf4d00445ccf3d 100644
--- a/103221-1/TS_103_221_01.xsd
+++ b/103221-1/TS_103_221_01.xsd
@@ -43,6 +43,9 @@
 	<xs:simpleType name="DId">
 		<xs:restriction base="etsi103280:UUID"/>
 	</xs:simpleType>
+	<xs:simpleType name="DSID">
+		<xs:restriction base="etsi103280:UUID"/>
+	</xs:simpleType>
 	<!-- See section 5.2 -->
 	<xs:simpleType name="X1TransactionId">
 		<xs:restriction base="etsi103280:UUID"/>
@@ -89,10 +92,15 @@
 			<xs:enumeration value="DeactivateAllTasks"/>
 			<xs:enumeration value="GetTaskDetails"/>
 			<xs:enumeration value="CreateDestination"/>
+			<xs:enumeration value="CreateDestinationSet"/>
 			<xs:enumeration value="ModifyDestination"/>
+			<xs:enumeration value="ModifyDestinationSet"/>
 			<xs:enumeration value="RemoveDestination"/>
+			<xs:enumeration value="RemoveDestinationSet"/>
 			<xs:enumeration value="RemoveAllDestinations"/>
+			<xs:enumeration value="RemoveAllDestinationSets"/>
 			<xs:enumeration value="GetDestinationDetails"/>
+			<xs:enumeration value="GetDestinationSetDetails"/>
 			<xs:enumeration value="GetNEStatus"/>
 			<xs:enumeration value="GetAllDetails"/>
 			<xs:enumeration value="ListAllDetails"/>
@@ -288,6 +296,12 @@
 	<xs:complexType name="ListOfDids">
 		<xs:sequence>
 			<xs:element name="dId" type="DId" minOccurs="0" maxOccurs="unbounded"/>
+			<xs:element name="dSId" type="DSId" minOccurs="0" maxOccurs="unbounded"/>
+		</xs:sequence>
+	</xs:complexType>
+	<xs:complexType name="ListOfDsids">
+		<xs:sequence>
+			<xs:element name="dSId" type="DSId" minOccurs="0" maxOccurs="unbounded"/>
 		</xs:sequence>
 	</xs:complexType>
 	<xs:complexType name="ListOfMediationDetails">
@@ -491,6 +505,107 @@
 			</xs:extension>
 		</xs:complexContent>
 	</xs:complexType>
+<!--- CR24>
+	<!-- See section 6.X.1 -->
+	<xs:complexType name="CreateDestinationSetRequest">
+		<xs:complexContent>
+			<xs:extension base="X1RequestMessage">
+				<xs:sequence>
+					<xs:element name="destinationSetDetails" type="DestinationSetDetails"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.X.1.2 -->
+	<xs:complexType name="DestinationSetDetails">
+		<xs:sequence>
+			<xs:element name="dSId" type="DSId"/>
+			<xs:element name="friendlyName" type="xs:string" minOccurs="0"/>
+			<xs:element name="listOfSetDId" type="ListOfSetDID" minOccurs="1" maxOccurs="unbounded"/>
+			<xs:element name="destinationDetailsExtensions" type="DestinationDetailsExtensions" minOccurs="0" maxOccurs="unbounded"/>
+		</xs:sequence>
+	</xs:complexType>
+	<xs:complexType name="ListOfSetDID">
+		<xs:choice>
+			<xs:element name="dId" type="DId"/>
+			<xs:element name="preference" type="Integer"/>
+		</xs:choice>
+	</xs:complexType>
+	<xs:complexType name="DestinationDetailsExtensions">
+		<xs:complexContent>
+			<xs:extension base="Extension"/>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="CreateDestinationSetResponse">
+		<xs:complexContent>
+			<xs:extension base="X1ResponseMessage">
+				<xs:sequence>
+					<xs:element name="oK" type="OK"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="ModifyDestinationSetRequest">
+		<xs:complexContent>
+			<xs:extension base="X1RequestMessage">
+				<xs:sequence>
+					<xs:element name="destinationSetDetails" type="DestinationSetDetails"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="ModifyDestinationSetResponse">
+		<xs:complexContent>
+			<xs:extension base="X1ResponseMessage">
+				<xs:sequence>
+					<xs:element name="oK" type="OK"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="RemoveDestinationSetRequest">
+		<xs:complexContent>
+			<xs:extension base="X1RequestMessage">
+				<xs:sequence>
+					<xs:element name="dSId" type="DSId"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="RemoveDestinationSetResponse">
+		<xs:complexContent>
+			<xs:extension base="X1ResponseMessage">
+				<xs:sequence>
+					<xs:element name="oK" type="OK"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="RemoveAllDestinationSetsRequest">
+		<xs:complexContent>
+			<xs:extension base="X1RequestMessage">
+				<xs:sequence/>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="RemoveAllDestinationSetsResponse">
+		<xs:complexContent>
+			<xs:extension base="X1ResponseMessage">
+				<xs:sequence>
+					<xs:element name="oK" type="OK"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+
+
 	<!-- See section 6.4.2 -->
 	<xs:complexType name="GetTaskDetailsRequest">
 		<xs:complexContent>
@@ -580,6 +695,46 @@
 			<xs:enumeration value="deliveryFault"/>
 		</xs:restriction>
 	</xs:simpleType>
+
+	<!-- CR24 See section 6.x -->
+	<xs:complexType name="GetDestinationSetDetailsRequest">
+		<xs:complexContent>
+			<xs:extension base="X1RequestMessage">
+				<xs:sequence>
+					<xs:element name="dSId" type="DSId"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="GetDestinationSetDetailsResponse">
+		<xs:complexContent>
+			<xs:extension base="X1ResponseMessage">
+				<xs:sequence>
+					<xs:element name="destinationSetResponseDetails" type="DestinationSetResponseDetails"/>
+				</xs:sequence>
+			</xs:extension>
+		</xs:complexContent>
+	</xs:complexType>
+	<xs:complexType name="DestinationSetResponseDetails">
+		<xs:sequence>
+			<xs:element name="destinationSetDetails" type="DestinationSetDetails"/>
+			<xs:element name="destinationSetStatus" type="DestinationSetStatus"/>
+		</xs:sequence>
+	</xs:complexType>
+	<!-- See section 6.x -->
+	<xs:complexType name="DestinationSetStatus">
+		<xs:sequence>
+			<xs:element name="destinationSetDeliveryStatus" type="DestinationSetDeliveryStatus"/>
+			<xs:element name="listOfFaults" type="ListOfFaults"/>
+		</xs:sequence>
+	</xs:complexType>
+	<xs:simpleType name="DestinationSetDeliveryStatus">
+		<xs:restriction base="xs:string">
+			<xs:enumeration value="activeAndWorking"/>
+			<xs:enumeration value="deliveryFault"/>
+		</xs:restriction>
+	</xs:simpleType>
 	<!-- See section 6.4.4 -->
 	<xs:complexType name="GetNEStatusRequest">
 		<xs:complexContent>
@@ -626,6 +781,7 @@
 					<xs:element name="neStatusDetails" type="NeStatusDetails"/>
 					<xs:element name="listOfTaskResponseDetails" type="ListOfTaskResponseDetails"/>
 					<xs:element name="listOfDestinationResponseDetails" type="ListOfDestinationResponseDetails"/>
+					<xs:element name="listOfDestinationSetResponseDetails" type="ListOfDestinationSetResponseDetails"/>
 				</xs:sequence>
 			</xs:extension>
 		</xs:complexContent>
@@ -640,6 +796,11 @@
 			<xs:element name="destinationResponseDetails" type="DestinationResponseDetails" minOccurs="0" maxOccurs="unbounded"/>
 		</xs:sequence>
 	</xs:complexType>
+	<xs:complexType name="ListOfDestinationSetResponseDetails">
+		<xs:sequence>
+			<xs:element name="destinationResponseSetDetails" type="DestinationResponseSetDetails" minOccurs="0" maxOccurs="unbounded"/>
+		</xs:sequence>
+	</xs:complexType>
 	<!-- See section 6.4.6 -->
 	<xs:complexType name="ListAllDetailsRequest">
 		<xs:complexContent>
@@ -655,6 +816,7 @@
 				<xs:sequence>
 					<xs:element name="ListOfXIDs" type="ListOfXids"/>
 					<xs:element name="ListOfDIDs" type="ListOfDids"/>
+					<xs:element name="ListOfDSIDs" type="ListOfDsids"/>
 				</xs:sequence>
 			</xs:extension>
 		</xs:complexContent>