diff --git a/v1_3_0/CDT-subscription-v1_3_0.xsd b/v1_3_0/CDT-subscription-v1_3_0.xsd
index e821c09293cc25ac72ca1c4efaa819a0778c7f4a..c487f5171956436c3444831ac0b390c9bd3e9776 100644
--- a/v1_3_0/CDT-subscription-v1_3_0.xsd
+++ b/v1_3_0/CDT-subscription-v1_3_0.xsd
@@ -84,8 +84,8 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 
 	<xs:complexType name="batchNotify">
 		<xs:sequence>
-			<xs:element name="number" type="xs:nonNegativeInteger" minOccurs="0" />
-			<xs:element name="duration" type="xs:duration" minOccurs="0" />
+			<xs:element name="number" type="xs:nonNegativeInteger" />
+			<xs:element name="duration" type="xs:duration" />
 		</xs:sequence>
 	</xs:complexType>