diff --git a/103120/schema/xsd/ts_103120_Task.xsd b/103120/schema/xsd/ts_103120_Task.xsd
index c815f12070705be3f9b6318d62e0ee39d4f33bd0..cc4f8d0b7f3ec47bd6026d348213548f1cf28156 100644
--- a/103120/schema/xsd/ts_103120_Task.xsd
+++ b/103120/schema/xsd/ts_103120_Task.xsd
@@ -186,6 +186,7 @@
         <xs:sequence>
             <xs:element name="ReferenceValue" type="etsi:LongString"/>
             <xs:element name="NatureOfReference" type="etsi:LongString" minOccurs="0"/>
+            <xs:element name="TransmissionTime" type="etsi:QualifiedDateTime" minOccurs="0"/>
         </xs:sequence>
     </xs:complexType>
     <xs:complexType name="NationalLDTaskingParameters" abstract="true">