diff --git a/33128/r19/TS33128Payloads.asn b/33128/r19/TS33128Payloads.asn
index 8b2f1c090ebe1439c8265d6460af2e6545edaa0a..71eb0d40e76cd5c01dd03c581efacf359f87e78c 100644
--- a/33128/r19/TS33128Payloads.asn
+++ b/33128/r19/TS33128Payloads.asn
@@ -304,7 +304,10 @@ XIRIEvent ::= CHOICE
     iMSHSSSubscriberRecordChange                        [174] IMSHSSSubscriberRecordChange,
 
     -- AMF events, see clause 6.2.2.2.14, continued from tag 147
-    aMFUEContextUpdate                                  [175] AMFUEContextUpdate
+    aMFUEContextUpdate                                  [175] AMFUEContextUpdate,
+
+    -- IMS events, see clause 7.12.4.2, continued from tag 164
+    startOfInterceptionWithEstablishedIMSDataChannel    [176] StartOfInterceptionWithEstablishedIMSDataChannel
 }
 
 -- ==============
@@ -592,7 +595,10 @@ IRIEvent ::= CHOICE
     iMSHSSSubscriberRecordChange                        [174] IMSHSSSubscriberRecordChange,
 
     -- AMF events, see clause 6.2.2.3, continued from tag 147
-    aMFUEContextUpdate                                  [175] AMFUEContextUpdate
+    aMFUEContextUpdate                                  [175] AMFUEContextUpdate,
+
+    -- IMS events, see clause 7.12.4.2, continued from tag 164
+    startOfInterceptionWithEstablishedIMSDataChannel    [176] StartOfInterceptionWithEstablishedIMSDataChannel
 }
 
 IRITargetIdentifier ::= SEQUENCE
@@ -4728,7 +4734,7 @@ IMSDataChannelModification ::= SEQUENCE
     mediaInstructions         [5] SBIType OPTIONAL
 }
 
--- See Clause 7.12.4.2.6 for details of this structure
+-- See clause 7.12.4.2.6 for details of this structure
 IMSDataChannelTermination ::= SEQUENCE
 {
     targetIdentity            [1] IMPU,
@@ -4738,6 +4744,16 @@ IMSDataChannelTermination ::= SEQUENCE
     mediaInstructionData      [5] SBIType OPTIONAL
 }
 
+-- See clause 7.12.4.2.7 for details of this structure
+StartOfInterceptionWithEstablishedIMSDataChannel ::= SEQUENCE
+{
+    targetIdentity            [1] IMPU,
+    callingIdentity           [2] IMPU OPTIONAL,
+    calledIdentities          [3] SEQUENCE OF IMPU OPTIONAL,
+    sessionEventNotification  [4] SBIType OPTIONAL,
+    mediaInstructions         [5] SBIType OPTIONAL
+}
+
 -- =========
 -- IMS CCPDU
 -- =========