diff --git a/33128/r17/TS33128Payloads.asn b/33128/r17/TS33128Payloads.asn
index 952d65126dd6dbd476cf5371bd20697058a0cb00..451f2ae7e3f88242d1d4b270af986085f7be1d51 100644
--- a/33128/r17/TS33128Payloads.asn
+++ b/33128/r17/TS33128Payloads.asn
@@ -177,7 +177,8 @@ XIRIEvent ::= CHOICE
     sTIRSHAKENSignatureValidation                       [104] STIRSHAKENSignatureValidation,
     -- IMS events, see clause 7.11.4.2
     iMSMessage                                          [105] IMSMessage,
-    startOfInterceptionForActiveIMSSession              [106] StartOfInterceptionForActiveIMSSession
+    startOfInterceptionForActiveIMSSession              [106] StartOfInterceptionForActiveIMSSession,
+    iMSCCUnavailable                                       [3140] IMSCCUnavailable
 }
 
 -- ==============
@@ -348,7 +349,9 @@ IRIEvent ::= CHOICE
 
     -- IMS events, see clause 7.11.4.2
     iMSMessage                                          [105] IMSMessage,
-    startOfInterceptionForActiveIMSSession              [106] StartOfInterceptionForActiveIMSSession
+    startOfInterceptionForActiveIMSSession              [106] StartOfInterceptionForActiveIMSSession,
+    iMSCCUnavailable                                       [3140]
+    IMSCCUnavailable
 
 }
 
@@ -2821,6 +2824,13 @@ StartOfInterceptionForActiveIMSSession ::= SEQUENCE
     location              [7] Location OPTIONAL
 }
 
+-- See clause 7.12.4.2.X for the details. 
+IMSCCUnavailable ::= SEQUENCE
+{ 
+    cCUnavailableReason   [1] UTF8String,
+    sDPState              [2] OCTET STRING OPTIONAL
+}
+
 -- ==============
 -- IMS parameters
 -- ==============
@@ -4262,4 +4272,4 @@ OGCURN ::= UTF8String
 -- TS 29.572 [24], clause 6.1.6.2.15
 MethodCode ::= INTEGER (16..31)
 
-END
\ No newline at end of file
+END