diff --git a/102232-1/LI-PS-PDU.asn b/102232-1/LI-PS-PDU.asn
index 47b30ce33daca37ed6b13d35c8b106c2741caa36..4aebb060690b288939738a9d08ff32918c028e62 100644
--- a/102232-1/LI-PS-PDU.asn
+++ b/102232-1/LI-PS-PDU.asn
@@ -269,7 +269,8 @@ TimeStampQualifier ::= ENUMERATED
 HI4Payload ::= CHOICE
 {
     threeGPP-LI-Notification [1] TS33128Payloads.LINotificationPayload,
-    ...
+    ...,
+    hi4Notification          [2] HI4Notification
 }
 
 -- ====================================
@@ -478,7 +479,6 @@ GcseIRI ::= CHOICE
     ...
 }
 
-
 -- ===========================
 -- Definitions for TRI Payload
 -- ===========================
@@ -671,6 +671,51 @@ EncryptedPayloadType ::= ENUMERATED
         -- encrypted payload is ETSI TS 102 232-1 (the present document)
 }
 
+-- =================================
+-- Definitions for HI4 notifications
+-- =================================
+
+HI4Notification ::= CHOICE
+{
+    liActivated                 [1] HI4LINotification,
+    liDeactivated               [2] HI4LINotification,
+    liModified                  [3] HI4LINotification,
+    ...
+}
+
+HI4LINotification ::= SEQUENCE
+{
+    startTime                   [1] GeneralizedTime OPTIONAL,
+    endTime                     [2] GeneralizedTime OPTIONAL,
+    targetIdentifiers           [3] SEQUENCE OF TargetIdentifier OPTIONAL,
+    interceptType               [4] InterceptType OPTIONAL,
+    agencyIdentifier            [5] UTF8String OPTIONAL,
+    authorizationIdentifier     [6] UTF8String OPTIONAL,
+    ...
+}
+
+TargetIdentifier ::= CHOICE
+{
+    targetIdentifierFormat      [1] TargetIdentifierFormat,
+    ...
+}
+
+TargetIdentifierFormat ::= SEQUENCE
+{
+    formatOwner                 [1] UTF8String (SIZE (1..255)),
+    formatName                  [2] UTF8String (SIZE (1..255)),
+    targetValue                 [3] UTF8String,
+    ...
+}
+
+InterceptType ::= ENUMERATED
+{
+    iriAndCc(1),
+    iriOnly(2),
+    ccOnly(3),
+    ...
+}
+
 -- ===================================
 -- Common Parameters
 -- ===================================