diff --git a/bundles/com.e1c.v8codestyle.form/META-INF/MANIFEST.MF b/bundles/com.e1c.v8codestyle.form/META-INF/MANIFEST.MF
index 980618b9..0bac6c3b 100644
--- a/bundles/com.e1c.v8codestyle.form/META-INF/MANIFEST.MF
+++ b/bundles/com.e1c.v8codestyle.form/META-INF/MANIFEST.MF
@@ -24,6 +24,7 @@ Import-Package: com._1c.g5.v8.bm.core;version="[7.5.0,8.0.0)",
  com._1c.g5.wiring.binder;version="[1.1.0,2.0.0)",
  com.e1c.g5.v8.dt.check;version="[2.0.0,3.0.0)",
  com.e1c.g5.v8.dt.check.components;version="[2.0.0,3.0.0)",
+ com.e1c.g5.v8.dt.check.ext;version="[1.0.0,2.0.0)",
  com.e1c.g5.v8.dt.check.settings;version="[3.0.0,4.0.0)",
  com.e1c.v8codestyle.check;version="[0.3.0,0.4.0)",
  com.google.common.base;version="[30.1.0,31.0.0)",
diff --git a/bundles/com.e1c.v8codestyle.form/plugin.xml b/bundles/com.e1c.v8codestyle.form/plugin.xml
index e8d9e0c8..a06927be 100644
--- a/bundles/com.e1c.v8codestyle.form/plugin.xml
+++ b/bundles/com.e1c.v8codestyle.form/plugin.xml
@@ -28,7 +28,7 @@
       </check>
       <check
             category="com.e1c.v8codestyle.form"
-            class="com.e1c.v8codestyle.form.check.FormListRefUseAlwaysFlagDisabledCheck">
+            class="com.e1c.v8codestyle.internal.form.ExecutableExtensionFactory:com.e1c.v8codestyle.form.check.FormListRefUseAlwaysFlagDisabledCheck">
       </check>
       <check
             category="com.e1c.v8codestyle.form"
diff --git a/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/FormListRefUseAlwaysFlagDisabledCheck.java b/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/FormListRefUseAlwaysFlagDisabledCheck.java
index 53af3e2c..7d49a0ab 100644
--- a/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/FormListRefUseAlwaysFlagDisabledCheck.java
+++ b/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/FormListRefUseAlwaysFlagDisabledCheck.java
@@ -70,7 +70,8 @@ public class FormListRefUseAlwaysFlagDisabledCheck
     @Override
     protected void configureCheck(CheckConfigurer builder)
     {
-        builder.title(Messages.FormListRefUseAlwaysFlagDisabledCheck_title)
+        builder.extension(new SkipBaseFormExtension())
+            .title(Messages.FormListRefUseAlwaysFlagDisabledCheck_title)
             .description(Messages.FormListRefUseAlwaysFlagDisabledCheck_description)
             .complexity(CheckComplexity.NORMAL)
             .severity(IssueSeverity.MINOR)
diff --git a/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/InputFieldListChoiceMode.java b/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/InputFieldListChoiceMode.java
index cfb9c69d..df893975 100644
--- a/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/InputFieldListChoiceMode.java
+++ b/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/InputFieldListChoiceMode.java
@@ -36,7 +36,6 @@ import com.e1c.v8codestyle.internal.form.CorePlugin;
 public final class InputFieldListChoiceMode
     extends BasicCheck
 {
-
     private static final String CHECK_ID = "input-field-list-choice-mode"; //$NON-NLS-1$
 
     @Override
@@ -48,7 +47,8 @@ public final class InputFieldListChoiceMode
     @Override
     protected void configureCheck(CheckConfigurer builder)
     {
-        builder.title(Messages.InputFieldListChoiceMode_title)
+        builder.extension(new SkipBaseFormExtension())
+            .title(Messages.InputFieldListChoiceMode_title)
             .description(Messages.InputFieldListChoiceMode_description)
             .complexity(CheckComplexity.NORMAL)
             .severity(IssueSeverity.MINOR)
@@ -71,5 +71,4 @@ public final class InputFieldListChoiceMode
                 INPUT_FIELD_EXT_INFO__LIST_CHOICE_MODE);
         }
     }
-
 }
diff --git a/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/SkipBaseFormExtension.java b/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/SkipBaseFormExtension.java
new file mode 100644
index 00000000..99d7c319
--- /dev/null
+++ b/bundles/com.e1c.v8codestyle.form/src/com/e1c/v8codestyle/form/check/SkipBaseFormExtension.java
@@ -0,0 +1,42 @@
+/*******************************************************************************
+ * Copyright (C) 2022, 1C-Soft LLC and others.
+ *
+ * This program and the accompanying materials are made
+ * available under the terms of the Eclipse Public License 2.0
+ * which is available at https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     1C-Soft LLC - initial API and implementation
+ *******************************************************************************/
+package com.e1c.v8codestyle.form.check;
+
+import com._1c.g5.v8.bm.core.IBmObject;
+import com._1c.g5.v8.dt.form.model.Form;
+import com._1c.g5.v8.dt.metadata.mdclass.ObjectBelonging;
+import com.e1c.g5.v8.dt.check.ICheckParameters;
+import com.e1c.g5.v8.dt.check.components.IBasicCheckExtension;
+import com.e1c.g5.v8.dt.check.ext.ITopObjectFilter;
+
+/**
+ * Check extension to avoid checking inside of a BaseForm
+ *
+ * @author Vadim Geraskin
+ */
+public class SkipBaseFormExtension
+    implements IBasicCheckExtension
+{
+    @Override
+    public ITopObjectFilter contributeTopObjectFilter()
+    {
+        return (IBmObject object, ICheckParameters parameters) -> !isBaseForm((Form)object);
+    }
+
+    private static boolean isBaseForm(Form form)
+    {
+        return form != null && form.getMdForm().getObjectBelonging() == ObjectBelonging.ADOPTED
+            && form.getExtensionForm() != null && !form.getExtensionForm().eIsProxy()
+            && (form.getBaseForm() == null || form.getBaseForm().eIsProxy());
+    }
+}