diff --git a/ets2panda/linter/src/lib/CookBookMsg.ts b/ets2panda/linter/src/lib/CookBookMsg.ts
index b021201ab0e03bb23043a5c1510b3169b3237f2f..bfe6c7024c62ece582abd28446faef1135e99b90 100644
--- a/ets2panda/linter/src/lib/CookBookMsg.ts
+++ b/ets2panda/linter/src/lib/CookBookMsg.ts
@@ -310,7 +310,7 @@ cookBookTag[274] =
 cookBookTag[275] =
   'The Custom component with custom layout capability needs to add the "@CustomLayout" decorator (arkui-custom-layout-need-add-decorator)';
 cookBookTag[276] =
-  'ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)';
+  'ArkTS 1.2 should implement all optional fields from the interface in the class (arkts-no-class-omit-interface-optional-prop)';
 cookBookTag[277] = 'Creating local classes is not supported (arkts-no-local-class)';
 cookBookTag[281] = '"@Prop" decorator is not supported (arkui-no-prop-decorator)';
 cookBookTag[282] = '"@StorageProp" decorator is not supported (arkui-no-storageprop-decorator)';
diff --git a/ets2panda/linter/src/lib/TypeScriptLinter.ts b/ets2panda/linter/src/lib/TypeScriptLinter.ts
index c4edcff3b3de35c964bfe1d8844226e382898b06..c518b28b9f3a05bc152e5e5d0c7e833da176e31c 100644
--- a/ets2panda/linter/src/lib/TypeScriptLinter.ts
+++ b/ets2panda/linter/src/lib/TypeScriptLinter.ts
@@ -8786,13 +8786,15 @@ export class TypeScriptLinter extends BaseTypeScriptLinter {
   }
 
   /**
-   * Ensures classes fully implement all properties from their interfaces.
+   * Ensures classes explicitly implement all optional properties from their interfaces.
+   * Required fields are ignored because the it's already enforced on ArkTS1.1.
    */
   private handleInterfaceFieldImplementation(clause: ts.HeritageClause): void {
     // Only process implements clauses
     if (clause.token !== ts.SyntaxKind.ImplementsKeyword) {
       return;
     }
+
     const classDecl = clause.parent as ts.ClassDeclaration;
     if (!ts.isClassDeclaration(classDecl) || !classDecl.name) {
       return;
@@ -8808,8 +8810,10 @@ export class TypeScriptLinter extends BaseTypeScriptLinter {
       if (!interfaceDecl) {
         continue;
       }
+
       // Gather all inherited interfaces
       const allInterfaces = this.getAllInheritedInterfaces(interfaceDecl);
+
       // If the class fails to implement any member, report once and exit
       if (!this.classImplementsAllMembers(classDecl, allInterfaces)) {
         this.incrementCounters(classDecl.name, FaultID.InterfaceFieldNotImplemented);
@@ -8851,24 +8855,32 @@ export class TypeScriptLinter extends BaseTypeScriptLinter {
   }
 
   /**
-   * Returns true if the class declaration declares every property or method
+   * Returns true if the class declaration declares every optional property or method
    * signature from the provided list of interface declarations.
    */
   private classImplementsAllMembers(classDecl: ts.ClassDeclaration, interfaces: ts.InterfaceDeclaration[]): boolean {
     void this;
 
+    // Check optional members only
     for (const intf of interfaces) {
       for (const member of intf.members) {
-        if ((ts.isPropertySignature(member) || ts.isMethodSignature(member)) && ts.isIdentifier(member.name)) {
-          const name = member.name.text;
-          const found = classDecl.members.some((m) => {
+        if (
+          (ts.isPropertySignature(member) || ts.isMethodSignature(member)) &&
+          ts.isIdentifier(member.name) &&
+          member.questionToken
+        ) {
+          const propName = member.name.text;
+
+          // does derived class have this member?
+          const hasImpl = classDecl.members.some((m) => {
             return (
               (ts.isPropertyDeclaration(m) || ts.isMethodDeclaration(m)) &&
               ts.isIdentifier(m.name) &&
-              m.name.text === name
+              m.name.text === propName
             );
           });
-          if (!found) {
+
+          if (!hasImpl) {
             return false;
           }
         }
diff --git a/ets2panda/linter/test/builtin/builtin_array_negative.ets.arkts2.json b/ets2panda/linter/test/builtin/builtin_array_negative.ets.arkts2.json
index bc4681ba7423cd3121bb98b68d138be7e9abc979..7a708cf5aa78607c14fe9a1dd1ada1e31c6c507c 100755
--- a/ets2panda/linter/test/builtin/builtin_array_negative.ets.arkts2.json
+++ b/ets2panda/linter/test/builtin/builtin_array_negative.ets.arkts2.json
@@ -224,16 +224,6 @@
             "rule": "Extends or implements expression are not supported(arkts-no-extends-expression)",
             "severity": "ERROR"
         },
-        {
-            "line": 47,
-            "column": 7,
-            "endLine": 47,
-            "endColumn": 11,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 59,
             "column": 3,
diff --git a/ets2panda/linter/test/builtin/builtin_class.ets.arkts2.json b/ets2panda/linter/test/builtin/builtin_class.ets.arkts2.json
index 11d39cae875aa581d22ce969828f85b9be9c6996..d4f92e186a552f92744e71c8977aeb014209ae57 100755
--- a/ets2panda/linter/test/builtin/builtin_class.ets.arkts2.json
+++ b/ets2panda/linter/test/builtin/builtin_class.ets.arkts2.json
@@ -24,16 +24,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 16,
-            "column": 7,
-            "endLine": 16,
-            "endColumn": 17,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 16,
             "column": 47,
@@ -64,16 +54,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 19,
-            "column": 7,
-            "endLine": 19,
-            "endColumn": 16,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 19,
             "column": 43,
@@ -104,16 +84,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 28,
-            "column": 7,
-            "endLine": 28,
-            "endColumn": 18,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 28,
             "column": 48,
@@ -144,16 +114,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 31,
-            "column": 7,
-            "endLine": 31,
-            "endColumn": 20,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 31,
             "column": 51,
@@ -204,16 +164,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 40,
-            "column": 7,
-            "endLine": 40,
-            "endColumn": 20,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 40,
             "column": 32,
@@ -244,16 +194,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 43,
-            "column": 7,
-            "endLine": 43,
-            "endColumn": 23,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 43,
             "column": 57,
@@ -281,7 +221,7 @@
             "endColumn": 20,
             "problem": "InterfaceFieldNotImplemented",
             "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
+            "rule": "ArkTS 1.2 should implement all optional fields from the interface in the class (arkts-no-class-omit-interface-optional-prop)",
             "severity": "ERROR"
         },
         {
@@ -344,16 +284,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 56,
-            "column": 7,
-            "endLine": 56,
-            "endColumn": 20,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 56,
             "column": 53,
@@ -404,16 +334,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 60,
-            "column": 7,
-            "endLine": 60,
-            "endColumn": 13,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 60,
             "column": 67,
@@ -474,16 +394,6 @@
             "rule": "API is not support use class in this API (arkts-builtin-final-class)",
             "severity": "ERROR"
         },
-        {
-            "line": 65,
-            "column": 7,
-            "endLine": 65,
-            "endColumn": 15,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 65,
             "column": 43,
diff --git a/ets2panda/linter/test/builtin/builtin_object_negative.ets.arkts2.json b/ets2panda/linter/test/builtin/builtin_object_negative.ets.arkts2.json
index 533a742ee1653ab2d1e42e8c26062193c05c9da9..29902703e0120f3d0107057e2d0e9716281a789d 100755
--- a/ets2panda/linter/test/builtin/builtin_object_negative.ets.arkts2.json
+++ b/ets2panda/linter/test/builtin/builtin_object_negative.ets.arkts2.json
@@ -194,16 +194,6 @@
             "rule": "API is not support ctor signature and func (arkts-builtin-cotr)",
             "severity": "ERROR"
         },
-        {
-            "line": 48,
-            "column": 7,
-            "endLine": 48,
-            "endColumn": 11,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 48,
             "column": 23,
@@ -374,16 +364,6 @@
             "rule": "Using narrowing of types is not allowed in this API (arkts-builtin-narrow-types)",
             "severity": "ERROR"
         },
-        {
-            "line": 92,
-            "column": 7,
-            "endLine": 92,
-            "endColumn": 11,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 93,
             "column": 3,
@@ -525,4 +505,4 @@
             "severity": "ERROR"
         }
     ]
-}
\ No newline at end of file
+}
diff --git a/ets2panda/linter/test/builtin/builtin_object_positive.ets.arkts2.json b/ets2panda/linter/test/builtin/builtin_object_positive.ets.arkts2.json
index 86f288bc70ec99db34200378bc3c3c6f2079ebab..7e7f373314ddd372af50cd4c50f48ba36d49e769 100755
--- a/ets2panda/linter/test/builtin/builtin_object_positive.ets.arkts2.json
+++ b/ets2panda/linter/test/builtin/builtin_object_positive.ets.arkts2.json
@@ -14,16 +14,6 @@
         "limitations under the License."
     ],
     "result": [
-        {
-            "line": 18,
-            "column": 7,
-            "endLine": 18,
-            "endColumn": 11,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 18,
             "column": 23,
diff --git a/ets2panda/linter/test/deprecatedapi/swiper_api.ets.arkts2.json b/ets2panda/linter/test/deprecatedapi/swiper_api.ets.arkts2.json
index 3799eb68a19549246cf75b3ad5d5c2d6a045b7a9..0d7d48b7bd59d68dded16567af1fbab103cd08c2 100755
--- a/ets2panda/linter/test/deprecatedapi/swiper_api.ets.arkts2.json
+++ b/ets2panda/linter/test/deprecatedapi/swiper_api.ets.arkts2.json
@@ -21,7 +21,7 @@
             "endColumn": 11,
             "problem": "InterfaceFieldNotImplemented",
             "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
+            "rule": "ArkTS 1.2 should implement all optional fields from the interface in the class (arkts-no-class-omit-interface-optional-prop)",
             "severity": "ERROR"
         },
         {
diff --git a/ets2panda/linter/test/main/no_class_omit_interface_optional.ets b/ets2panda/linter/test/main/no_class_omit_interface_optional.ets
index 6ea84551998b2c75382e88a6425f999647c37f8b..875ef361b3472e323ebf4138622eecd8395bf0c3 100644
--- a/ets2panda/linter/test/main/no_class_omit_interface_optional.ets
+++ b/ets2panda/linter/test/main/no_class_omit_interface_optional.ets
@@ -13,7 +13,7 @@
  * limitations under the License.
  */
 
-// 1) All fields implemented — no error
+// 1) Required Fields
 interface I1 {
   a: number;
   b: string;
@@ -23,21 +23,11 @@ class C1 implements I1 { // ✅ no error
   b: string = '';
 }
 
-// 2) One field missing — error
-interface I2 {
-  x: boolean;
-  y: number;
-  cb(): void;
-}
-class C2 implements I2 { // ❌ Error: missing `y`
-  x: boolean = true;
-}
-class C21 implements I2 { // ❌ Error: missing `cb()`
-  x: boolean = true;
-  y: number = 5.0;
+class C2 implements I1 { // ✅ no error - Required fields are already handled on ArkTS 1.1
+  a: number = 0.0;
 }
 
-// 3) Optional fields are treated as required — error
+// 2) Optional fields are treated as required
 interface I3 {
   foo?: string;
   bar?: number;
@@ -45,18 +35,17 @@ interface I3 {
 class C3 implements I3 { // ❌ Error: missing both `foo` and `bar` (first missing stops checking)
 }
 
-// 4) Optional field implemented
 class C4 implements I3 { // ✅ no error
   foo?: string;
   bar?: number;
 }
 
-// 5) Interface extends another
+// 3) Interface extends another
 interface A5 {
-  p: string;
+  p?: string;
 }
 interface B5 extends A5 {
-  q: string;
+  q?: string;
 }
 class C5 implements B5 { // ✅ no error
   p: string = 'hello';
@@ -69,9 +58,9 @@ class C61 implements B5 { // ❌ Error: missing `p`
   q: string = 'hello';
 }
 
-// 6) Multiple interfaces at once
-interface I6a { u: number }
-interface I6b { v: boolean }
+// 4) Multiple interfaces at once
+interface I6a { u?: number }
+interface I6b { v?: boolean }
 class C7 implements I6a, I6b { // ✅ no error
   u: number = 42.0;
   v: boolean = false;
diff --git a/ets2panda/linter/test/main/no_class_omit_interface_optional.ets.arkts2.json b/ets2panda/linter/test/main/no_class_omit_interface_optional.ets.arkts2.json
index 6281cdd59ea5dcab7b10fcf2a9cb9ecb3c3dc31e..5b06edf9f560f71c2bde4dbe84d29868c63a2267 100644
--- a/ets2panda/linter/test/main/no_class_omit_interface_optional.ets.arkts2.json
+++ b/ets2panda/linter/test/main/no_class_omit_interface_optional.ets.arkts2.json
@@ -14,65 +14,45 @@
         "limitations under the License."
     ],
     "result": [
-        {
-            "line": 32,
-            "column": 7,
-            "endLine": 32,
-            "endColumn": 9,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
         {
             "line": 35,
             "column": 7,
             "endLine": 35,
-            "endColumn": 10,
-            "problem": "InterfaceFieldNotImplemented",
-            "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
-            "severity": "ERROR"
-        },
-        {
-            "line": 45,
-            "column": 7,
-            "endLine": 45,
             "endColumn": 9,
             "problem": "InterfaceFieldNotImplemented",
             "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
+            "rule": "ArkTS 1.2 should implement all optional fields from the interface in the class (arkts-no-class-omit-interface-optional-prop)",
             "severity": "ERROR"
         },
         {
-            "line": 65,
+            "line": 54,
             "column": 7,
-            "endLine": 65,
+            "endLine": 54,
             "endColumn": 9,
             "problem": "InterfaceFieldNotImplemented",
             "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
+            "rule": "ArkTS 1.2 should implement all optional fields from the interface in the class (arkts-no-class-omit-interface-optional-prop)",
             "severity": "ERROR"
         },
         {
-            "line": 68,
+            "line": 57,
             "column": 7,
-            "endLine": 68,
+            "endLine": 57,
             "endColumn": 10,
             "problem": "InterfaceFieldNotImplemented",
             "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
+            "rule": "ArkTS 1.2 should implement all optional fields from the interface in the class (arkts-no-class-omit-interface-optional-prop)",
             "severity": "ERROR"
         },
         {
-            "line": 79,
+            "line": 68,
             "column": 7,
-            "endLine": 79,
+            "endLine": 68,
             "endColumn": 9,
             "problem": "InterfaceFieldNotImplemented",
             "suggest": "",
-            "rule": "ArkTS 1.2 should implement all fields in the interface in the class (arkts-no-class-omit-interface-optional-prop)",
+            "rule": "ArkTS 1.2 should implement all optional fields from the interface in the class (arkts-no-class-omit-interface-optional-prop)",
             "severity": "ERROR"
         }
     ]
-}
+}
\ No newline at end of file