diff --git a/33128/r16/TS33128Payloads.asn b/33128/r16/TS33128Payloads.asn
index 3ad6a488a2576ac7db9046501f59ca8add3ec765..0e8551602352e5f69ba2f38c600effd0364c47cf 100644
--- a/33128/r16/TS33128Payloads.asn
+++ b/33128/r16/TS33128Payloads.asn
@@ -2135,6 +2135,9 @@ GUMMEI ::= SEQUENCE
     mNC         [3] MNC
 }
 
+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
@@ -2289,9 +2292,16 @@ 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
@@ -2300,6 +2310,8 @@ SUPI ::= CHOICE
     nAI         [2] NAI
 }
 
+SUPIType ::= INTEGER (0..7)
+
 SUPIUnauthenticatedIndication ::= BOOLEAN
 
 TargetIdentifier ::= CHOICE