diff --git a/33128/r18/TS33128Payloads.asn b/33128/r18/TS33128Payloads.asn
index e16aa3dc0ab203f8035112f7348c21426a5a319b..41b0a880dc51121299c6d99b263b5c5a04c84e89 100644
--- a/33128/r18/TS33128Payloads.asn
+++ b/33128/r18/TS33128Payloads.asn
@@ -287,7 +287,16 @@ XIRIEvent ::= CHOICE
 
     -- MMS-related events continued from choice 35
     mMSConvertedFromEmail                               [165] MMSConvertedFromEmail,
-    mMSConvertedToEmail                                 [166] MMSConvertedToEmail
+    mMSConvertedToEmail                                 [166] MMSConvertedToEmail,
+
+    -- Tags 167 to 175 are not used in this version of the specification
+
+    -- SGW events, see clause 6.3.3.2
+    ePSPDNConnectionEstablishment                       [176] EPSPDNConnectionEstablishment,
+    ePSPDNConnectionModification                        [177] EPSPDNConnectionModification,
+    ePSPDNConnectionRelease                             [178] EPSPDNConnectionRelease,
+    ePSStartOfInterceptionWithEstablishedPDNConnection  [179] EPSStartOfInterceptionWithEstablishedPDNConnection,
+    ePSPDNUnsuccessfulProcedure                         [180] EPSPDNUnsuccessfulProcedure
 }
 
 -- ==============
@@ -558,7 +567,16 @@ IRIEvent ::= CHOICE
 
     -- MMS-related events continued from choice 35
     mMSConvertedFromEmail                               [165] MMSConvertedFromEmail,
-    mMSConvertedToEmail                                 [166] MMSConvertedToEmail
+    mMSConvertedToEmail                                 [166] MMSConvertedToEmail,
+
+    -- Tags 167 to 175 are not used in this version of the specification
+
+    -- SGW events, see clause 6.3.3.2
+    ePSPDNConnectionEstablishment                       [176] EPSPDNConnectionEstablishment,
+    ePSPDNConnectionModification                        [177] EPSPDNConnectionModification,
+    ePSPDNConnectionRelease                             [178] EPSPDNConnectionRelease,
+    ePSStartOfInterceptionWithEstablishedPDNConnection  [179] EPSStartOfInterceptionWithEstablishedPDNConnection,
+    ePSPDNUnsuccessfulProcedure                         [180] EPSPDNUnsuccessfulProcedure
 }
 
 IRITargetIdentifier ::= SEQUENCE
@@ -2338,7 +2356,8 @@ SMFUnsuccessfulProcedure ::= SEQUENCE
     accessType                  [16] AccessType OPTIONAL,
     rATType                     [17] RATType OPTIONAL,
     sMPDUDNRequest              [18] SMPDUDNRequest OPTIONAL,
-    location                    [19] Location OPTIONAL
+    location                    [19] Location OPTIONAL,
+    ePSPDNUnsuccessfulProcedure [20] EPSPDNUnsuccessfulProcedure OPTIONAL
 }
 
 -- See clause 6.2.3.2.8 for details of this structure
@@ -2905,6 +2924,15 @@ EPSStartOfInterceptionWithEstablishedPDNConnection ::= SEQUENCE
     bearerContexts                     [17] SEQUENCE OF EPSBearerContext
 }
 
+EPSPDNUnsuccessfulProcedure ::= SEQUENCE
+{
+    failureCause        [1] ESMCause,
+    initiator           [2] Initiator,
+    ePSSubscriberIDs    [3] EPSSubscriberIDs,
+    iMSIUnauthenticated [4] IMSIUnauthenticatedIndication OPTIONAL,
+    failedProcedure     [5] EPSPDNFailedProcedure
+}
+
 PFDDataForApps ::= SET OF PFDDataForApp
 
 PFDDataForApp ::= SEQUENCE
@@ -3095,6 +3123,13 @@ EPSPDNConnectionRequestType ::= ENUMERATED
 
 EPSPDNConnectionReleaseScopeIndication ::= BOOLEAN
 
+EPSPDNFailedProcedure ::= CHOICE
+{
+    ePSPDNConnectionEstablishment [1] EPSPDNConnectionEstablishment,
+    ePSPDNConnectionModification  [2] EPSPDNConnectionModification,
+    ePSPDNConnectionRelease       [3] EPSPDNConnectionRelease
+}
+
 FiveGSInterworkingInfo ::= SEQUENCE
 {
     fiveGSInterworkingIndicator  [1] FiveGSInterworkingIndicator,
diff --git a/testing/asn_lint_exceptions.json b/testing/asn_lint_exceptions.json
index 300225caf915b332e222ebceb954b88e7457bcaa..eb6d7919d1d4071c9fa516767bf8afc243abdd19 100644
--- a/testing/asn_lint_exceptions.json
+++ b/testing/asn_lint_exceptions.json
@@ -65,7 +65,9 @@
         "Tag 8 missing in MMEStartOfInterceptionWithEPSAttachedUE",
         "Tag 11 missing in MMEStartOfInterceptionWithEPSAttachedUE",
         "Tag 161 XIRIEvent field 'iPIRIPacketReport' is not present in IRIEvent",
-        "Tag 161 missing in IRIEvent"
+        "Tag 161 missing in IRIEvent",
+        "Tags 167-175 missing in XIRIEvent",
+        "Tags 167-175 missing in IRIEvent"
     ],
     "33128/r19/TS33128Payloads.asn" : [
         "Tag 100 XIRIEvent field 'n9HRPDUSessionInfo' is not present in IRIEvent",