diff --git a/103120/examples/xml/request1.xml b/103120/examples/xml/request1.xml
index 5cba416de1209b867cb451655ca3a840979b5832..b5db0381a57b80f9dc4687901711355c546d5c30 100644
--- a/103120/examples/xml/request1.xml
+++ b/103120/examples/xml/request1.xml
@@ -56,6 +56,16 @@
                                         <task:Value>442079460223</task:Value>
                                     </task:TargetIdentifierValue>
                                 </task:TargetIdentifierValues>
+                                <task:ServiceType>
+                                    <common:Owner>ETSI</common:Owner>
+                                    <common:Name>TaskServiceType</common:Name>
+                                    <common:Value>DataType1</common:Value>
+                                </task:ServiceType>
+                                <task:TargetIdentifierSubtype>
+                                    <common:Owner>CSP01</common:Owner>
+                                    <common:Name>TargetIdentifierSubtype</common:Name>
+                                    <common:Value>AccountType1</common:Value>
+                                </task:TargetIdentifierSubtype>
                             </task:TargetIdentifier>
                             <task:DeliveryType>
                                 <common:Owner>ETSI</common:Owner>
diff --git a/103120/examples/xml/request4-TargetIdentifierSubtype.xml b/103120/examples/xml/request4-TargetIdentifierSubtype.xml
new file mode 100644
index 0000000000000000000000000000000000000000..99f201a98309daea4d2f35f510d0acb3b873e7a6
--- /dev/null
+++ b/103120/examples/xml/request4-TargetIdentifierSubtype.xml
@@ -0,0 +1,114 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+    This example is roughly the same as request4.xml, except for the use of
+    TargetIdentifierSubtype.
+
+    For this example, we say that there is a CSP which has two types of accounts,
+    one for Product A and one for Product B. But these two account types
+    have an overlapping ID space, such that the ServiceAccessIdentifier 123456789
+    could refer to an account of Product A and a different person's account
+    of Product B.
+
+    If an LEA does not know this, or does not know which account type they are trying
+    to target, the LEA can omit the TargetIdentifierSubtype, which may cause
+    out-of-band correspondence to be required for the CSP to target the correct account.
+    However, if the LEA knows which product their target is using, the LEA
+    can provide this information in the TargetIdentifierSubtype field.
+
+    In this example below, the LEA knows that their target has an account for
+    Product B with the identifier 123456789. So the RequestDetails object provides
+    the ServiceAccessIdentifier 123456789 and the TargetIdentifierSubtype AccountTypeB.
+    This distinguishes the target of the request from the account in Product A
+    with the same identifier, 123456789.
+
+    Additionally, note that the RequestType is SubscriberData. This describes the type
+    of data to be disclosed, and could apply equally to an account of either type A or type B.
+ -->
+<HI1Message xmlns="http://uri.etsi.org/03120/common/2019/10/Core" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:common="http://uri.etsi.org/03120/common/2016/02/Common" xmlns:task="http://uri.etsi.org/03120/common/2020/09/Task" xmlns:auth="http://uri.etsi.org/03120/common/2020/09/Authorisation">
+    <Header>
+        <SenderIdentifier>
+            <CountryCode>XX</CountryCode>
+            <UniqueIdentifier>ACTOR01</UniqueIdentifier>
+        </SenderIdentifier>
+        <ReceiverIdentifier>
+            <CountryCode>XX</CountryCode>
+            <UniqueIdentifier>ACTOR02</UniqueIdentifier>
+        </ReceiverIdentifier>
+        <TransactionIdentifier>c02358b2-76cf-4ba4-a8eb-f6436ccaea2e</TransactionIdentifier>
+        <Timestamp>2019-09-30T13:37:00.000000Z</Timestamp>
+        <Version>
+            <ETSIVersion>V1.13.1</ETSIVersion>
+            <NationalProfileOwner>XX</NationalProfileOwner>
+            <NationalProfileVersion>v1.0</NationalProfileVersion>
+        </Version>
+    </Header>
+    <Payload>
+        <RequestPayload>
+            <ActionRequests>
+                <ActionRequest>
+                    <ActionIdentifier>0</ActionIdentifier>
+                    <CREATE>
+                        <HI1Object xsi:type="auth:AuthorisationObject">
+                            <ObjectIdentifier>7dbbc880-8750-4d3c-abe7-ea4a17646045</ObjectIdentifier>
+                            <CountryCode>XX</CountryCode>
+                            <OwnerIdentifier>ACTOR01</OwnerIdentifier>
+                            <auth:AuthorisationReference>W000001</auth:AuthorisationReference>
+                            <auth:AuthorisationTimespan>
+                                <auth:StartTime>2019-09-30T12:00:00Z</auth:StartTime>
+                                <auth:EndTime>2019-12-01T12:00:00Z</auth:EndTime>
+                            </auth:AuthorisationTimespan>
+                        </HI1Object>
+                    </CREATE>
+                </ActionRequest>
+                <ActionRequest>
+                    <ActionIdentifier>1</ActionIdentifier>
+                    <CREATE>
+                        <HI1Object xsi:type="task:LDTaskObject">
+                            <ObjectIdentifier>2b36a78b-b628-416d-bd22-404e68a0cd36</ObjectIdentifier>
+                            <CountryCode>XX</CountryCode>
+                            <OwnerIdentifier>ACTOR01</OwnerIdentifier>
+                            <AssociatedObjects>
+                                <AssociatedObject>7dbbc880-8750-4d3c-abe7-ea4a17646045</AssociatedObject>
+                            </AssociatedObjects>
+                            <task:Reference>XX-ACTOR01-1234</task:Reference>
+                            <task:RequestDetails>
+                                <task:Type>
+                                    <common:Owner>ETSI</common:Owner>
+                                    <common:Name>RequestType</common:Name>
+                                    <common:Value>SubscriberData</common:Value>
+                                </task:Type>
+                                <task:StartTime>2019-09-30T12:00:00Z</task:StartTime>
+                                <task:EndTime>2019-12-30T12:00:00Z</task:EndTime>
+                                <task:RequestValues>
+                                    <task:RequestValue>
+                                        <task:FormatType>
+                                            <task:FormatOwner>ETSI</task:FormatOwner>
+                                            <task:FormatName>ServiceAccessIdentifier</task:FormatName>
+                                        </task:FormatType>
+                                        <task:Value>123456789</task:Value>
+                                    </task:RequestValue>
+                                </task:RequestValues>
+                                <task:TargetIdentifierSubtype>
+                                    <common:Owner>ACTOR02</common:Owner>
+                                    <common:Name>TargetIdentifierSubtype</common:Name>
+                                    <common:Value>AccountTypeB</common:Value>
+                                </task:TargetIdentifierSubtype>
+                            </task:RequestDetails>
+                            <task:DeliveryDetails>
+                                <task:LDDeliveryDestination>
+                                    <task:DeliveryAddress>
+                                        <task:IPv4Address>192.0.2.0</task:IPv4Address>
+                                    </task:DeliveryAddress>
+                                </task:LDDeliveryDestination>
+                            </task:DeliveryDetails>
+                            <task:CSPID>
+                                <CountryCode>XX</CountryCode>
+                                <UniqueIdentifier>ACTOR02</UniqueIdentifier>
+                            </task:CSPID>
+                        </HI1Object>
+                    </CREATE>
+                </ActionRequest>
+            </ActionRequests>
+        </RequestPayload>
+    </Payload>
+</HI1Message>
diff --git a/103120/examples/xml/request4.xml b/103120/examples/xml/request4.xml
index 4e0671a4017f24fb50e619d97bdabef4adc054cd..b99fa9e97688fb78e9168dff4858781cc659c81f 100644
--- a/103120/examples/xml/request4.xml
+++ b/103120/examples/xml/request4.xml
@@ -47,6 +47,11 @@
                             </AssociatedObjects>
                             <task:Reference>XX-ACTOR01-1234</task:Reference>
                             <task:RequestDetails>
+                                <task:Type>
+                                    <common:Owner>ETSI</common:Owner>
+                                    <common:Name>RequestType</common:Name>
+                                    <common:Value>SubscriberData</common:Value>
+                                </task:Type>
                                 <task:StartTime>2019-09-30T12:00:00Z</task:StartTime>
                                 <task:EndTime>2019-12-30T12:00:00Z</task:EndTime>
                                 <task:RequestValues>
diff --git a/103120/schema/xsd/ts_103120_Task.xsd b/103120/schema/xsd/ts_103120_Task.xsd
index 59f45d04b29e739ab8f4753ca656e273e076c709..59343ea78b3455ffa7a856cf41fc46268d9572d6 100644
--- a/103120/schema/xsd/ts_103120_Task.xsd
+++ b/103120/schema/xsd/ts_103120_Task.xsd
@@ -38,6 +38,7 @@
         <xs:sequence>
             <xs:element name="TargetIdentifierValues" type="TargetIdentifierValues" minOccurs="0"/>
             <xs:element name="ServiceType" type="common:DictionaryEntry" minOccurs="0"/>
+            <xs:element name="TargetIdentifierSubtype" type="common:DictionaryEntry" minOccurs="0"/>
         </xs:sequence>
     </xs:complexType>
     <xs:complexType name="TargetIdentifierValues">
@@ -136,6 +137,7 @@
             <xs:element name="ObservedTimes" type="etsi:QualifiedDateTime" minOccurs="0" maxOccurs="unbounded"/>
             <xs:element name="RequestValues" type="RequestValues" minOccurs="0"/>
             <xs:element name="Subtype" type="RequestSubtype" minOccurs="0"/>
+            <xs:element name="TargetIdentifierSubtype" type="common:DictionaryEntry" minOccurs="0"/>
         </xs:sequence>
     </xs:complexType>
     <xs:complexType name="RequestValues">