diff --git a/33128/r18/TS33128Payloads.asn b/33128/r18/TS33128Payloads.asn
index 2783c29b7682f41cf728ec246596830ad958aa45..8f26a2861f446d68373dc869de60231dc09d305c 100644
--- a/33128/r18/TS33128Payloads.asn
+++ b/33128/r18/TS33128Payloads.asn
@@ -203,7 +203,10 @@ XIRIEvent ::= CHOICE
     eESACRSubscription                                  [120] EESACRSubscription,
     eESACRNotification                                  [121] EESACRNotification,
     eESEECContextRelocation                             [122] EESEECContextRelocation,
-    eESStartOfInterceptionWithRegisteredEEC             [123] EESStartOfInterceptionWithRegisteredEEC
+    eESStartOfInterceptionWithRegisteredEEC             [123] EESStartOfInterceptionWithRegisteredEEC,
+
+    -- UDM events, see clause 7.2.2.3, continued from tag 110
+    uDMStartOfInterceptionWithRegisteredTarget          [901] UDMStartOfInterceptionWithRegisteredTarget
 }
 
 -- ==============
@@ -399,7 +402,10 @@ IRIEvent ::= CHOICE
     eESACRSubscription                                  [120] EESACRSubscription,
     eESACRNotification                                  [121] EESACRNotification,
     eESEECContextRelocation                             [122] EESEECContextRelocation,
-    eESStartOfInterceptionWithRegisteredEEC             [123] EESStartOfInterceptionWithRegisteredEEC
+    eESStartOfInterceptionWithRegisteredEEC             [123] EESStartOfInterceptionWithRegisteredEEC,
+
+    -- UDM events, see clause 7.2.2.4, continued from tag 110
+    uDMStartOfInterceptionWithRegisteredTarget          [901] UDMStartOfInterceptionWithRegisteredTarget
 }
 
 IRITargetIdentifier ::= SEQUENCE
@@ -2334,7 +2340,9 @@ UDMCancelLocationMessage ::= SEQUENCE
     gPSI                        [3] GPSI OPTIONAL,
     gUAMI                       [4] GUAMI OPTIONAL,
     pLMNID                      [5] PLMNID OPTIONAL,
-    cancelLocationMethod        [6] UDMCancelLocationMethod
+    cancelLocationMethod        [6] UDMCancelLocationMethod,
+    aMFDeregistrationInfo       [7] UDMAMFDeregistrationInfo OPTIONAL,
+    deregistrationData          [8] UDMDeregistrationData OPTIONAL
 }
 
 UDMLocationInformationResult ::= SEQUENCE
@@ -2369,6 +2377,13 @@ UDMUEAuthenticationResponse ::= SEQUENCE
     problemDetails              [4] UDMProblemDetails OPTIONAL
 }
 
+UDMStartOfInterceptionWithRegisteredTarget ::= SEQUENCE
+{
+    sUPI                        [1] SUPI,
+    gPSI                        [2] GPSI OPTIONAL,
+    uDMSubscriptionDataSets     [3] SBIType
+}
+
 -- =================
 -- 5G UDM parameters
 -- =================
@@ -2473,6 +2488,31 @@ UDMInvalidParameters ::= SEQUENCE
 
 RoamingIndicator ::= BOOLEAN
 
+UDMAMFDeregistrationInfo ::= SEQUENCE
+{
+    gUAMI                   [1] GUAMI,
+    purgeFlag               [2] BOOLEAN
+}
+
+UDMDeregistrationData ::= SEQUENCE
+{
+    deregReason             [1] UDMDeregReason OPTIONAL,
+    accessType              [2] AccessType OPTIONAL,
+    pDUSessionID            [3] PDUSessionID OPTIONAL
+}
+
+UDMDeregReason ::= ENUMERATED
+{
+    uEInitialRegistration(1),
+    uERegistrationAreaChange(2),
+    subscriptionWithdrawn(3),
+    fiveGSToEPSMobility(4),
+    fiveGSToEPSMobilityUeInitialRegistration(5),
+    reregistrationRequired(6),
+    sMFContextTransferred(7),
+    duplicatePDUSession(8),
+    fiveGSRVCCToUTRANMobility(9)
+}
 -- ===================
 -- 5G SMSF definitions
 -- ===================
@@ -4968,6 +5008,19 @@ ReRegRequiredIndicator ::= ENUMERATED
 
 RoutingIndicator ::= INTEGER (0..9999)
 
+-- Details for the encoding and use of this parameter may be found in the clause
+-- that defines the xIRI that carries it. This parameter provides a generic
+-- mechanism to convey service based interface structures defined in Stage 3 working groups.
+SBIType ::= SEQUENCE
+{
+    sBIReference         [1] SBIReference,
+    sBIValue             [2] SBIValue
+}
+
+SBIReference ::= UTF8String
+
+SBIValue ::= UTF8String
+
 SchemeOutput ::= OCTET STRING
 
 ServiceAreaInformation ::= SEQUENCE (SIZE(1..MAX)) OF ServiceAreaInfo