diff --git a/33128/r17/TS33128Payloads.asn b/33128/r17/TS33128Payloads.asn
index b877d12eeadb6c6fc696fa93da874c5704b54f73..f14eb6d51ebda483fb3344026882a3192e24dd27 100644
--- a/33128/r17/TS33128Payloads.asn
+++ b/33128/r17/TS33128Payloads.asn
@@ -4197,6 +4197,9 @@ GUTI ::= SEQUENCE
     mTMSI        [5] TMSI
 }
 
+HomeNetworkIdentifier ::= UTF8String
+
+-- This parameter shall be encoded as an octet string as a single octet containing the Home Network Public ID.
 HomeNetworkPublicKeyID ::= OCTET STRING
 
 HSMFURI ::= UTF8String
@@ -4416,9 +4419,16 @@ SUCI ::= SEQUENCE
     protectionSchemeID          [4] ProtectionSchemeID,
     homeNetworkPublicKeyID      [5] HomeNetworkPublicKeyID,
     schemeOutput                [6] SchemeOutput,
-    routingIndicatorLength      [7] INTEGER (1..4) OPTIONAL
-       -- shall be included if different from the number of meaningful digits given
-       -- in routingIndicator
+    routingIndicatorLength      [7] INTEGER (1..4) OPTIONAL,
+    -- the sUPIType and homeNetworkIdentifier fields are OPTIONAL to support reporting SUCIs in
+    -- the format defined in 23.003 [19] version 15.0.0 to 15.4.0
+    -- to report SUCIs in the format defined in 23.003 [19] version 15.0.0
+    sUPIType                    [8] SUPIType OPTIONAL,
+    -- if the sUPIType is '0' the homeNetworkIdentifier is the PLMN and may be absent as it is reported 
+    -- as the MCC and MNC above
+    -- if the sUPIType is not '0' the mCC and mNC fields above 
+    -- shall be populated with '000' and ignored by the receiver.
+    homeNetworkIdentifier       [9] HomeNetworkIdentifier OPTIONAL
 }
 
 SUPI ::= CHOICE
@@ -4427,6 +4437,8 @@ SUPI ::= CHOICE
     nAI         [2] NAI
 }
 
+SUPIType ::= INTEGER (0..7)
+
 SUPIUnauthenticatedIndication ::= BOOLEAN
 
 SwitchOffIndicator ::= ENUMERATED