diff --git a/CDT-subscription.xsd b/CDT-subscription.xsd
index 11d91200f607e0d6d4168c7400acbdb22aad406d..37b364086c7b782e8749ce310ce27400508fa74d 100644
--- a/CDT-subscription.xsd
+++ b/CDT-subscription.xsd
@@ -84,8 +84,8 @@ oneM2M EXPRESSLY ADVISES ANY AND ALL USE OF OR RELIANCE UPON THIS INFORMATION PR
 	
 	<xs:complexType name="rateLimit">
 		<xs:sequence>
-			<xs:element name="maxNrOfNotify" type="xs:nonNegativeInteger" minOccurs="0" />
-			<xs:element name="timeWindow" type="xs:duration" minOccurs="0" />
+			<xs:element name="maxNrOfNotify" type="xs:nonNegativeInteger"/>
+			<xs:element name="timeWindow" type="xs:duration"/>
 		</xs:sequence>
 	</xs:complexType>