diff --git a/core/shared/src/main/scala/sigma/serialization/TypeSerializer.scala b/core/shared/src/main/scala/sigma/serialization/TypeSerializer.scala
index 1936bbcd9a..fcd8885664 100644
--- a/core/shared/src/main/scala/sigma/serialization/TypeSerializer.scala
+++ b/core/shared/src/main/scala/sigma/serialization/TypeSerializer.scala
@@ -5,7 +5,7 @@ import sigma.VersionContext
 import sigma.ast.SCollectionType.{CollectionTypeCode, NestedCollectionTypeCode}
 import sigma.ast._
 import sigma.util.safeNewArray
-import sigma.validation.ValidationRules.{CheckPrimitiveTypeCode, CheckTypeCode}
+import sigma.validation.ValidationRules.{CheckPrimitiveTypeCode, CheckTypeCode, CheckTypeCodeV6}
 
 import java.nio.charset.StandardCharsets
 
@@ -14,6 +14,8 @@ class TypeSerializer {
   import TypeSerializer._
 
   def getEmbeddableType(code: Int): SType = {
+    // todo : add versioning to the check like done for other rules
+    // todo : add unsigned bit int to embeddable id to type
     CheckPrimitiveTypeCode(code.toByte)
     embeddableIdToType(code)
   }
@@ -215,9 +217,13 @@ class TypeSerializer {
           }
           SFunc(tDom, tRange, tpeParams)
         case _ =>
-          // todo: 6.0: replace 1008 check with identical behavior but other opcode, to activate
-          //  ReplacedRule(1008 -> new opcode) during 6.0 activation
-          CheckTypeCode(c.toByte)
+          // the #1008 check replaced with one with identical behavior but different opcode (1018), to activate
+          //  ReplacedRule(1008 -> 1018) during 6.0 activation
+          if (VersionContext.current.isV6SoftForkActivated) {
+            CheckTypeCodeV6(c.toByte)
+          } else {
+            CheckTypeCode(c.toByte)
+          }
           NoType
       }
     }
diff --git a/core/shared/src/main/scala/sigma/validation/ValidationRules.scala b/core/shared/src/main/scala/sigma/validation/ValidationRules.scala
index 249e2fce0a..7cc552b140 100644
--- a/core/shared/src/main/scala/sigma/validation/ValidationRules.scala
+++ b/core/shared/src/main/scala/sigma/validation/ValidationRules.scala
@@ -77,7 +77,7 @@ object ValidationRules {
   /** The id of the first validation rule. Can be used as the beginning of the rules id range. */
   val FirstRuleId = 1000.toShort
 
-  object CheckPrimitiveTypeCode extends ValidationRule(1007,
+  class CheckPrimitiveTypeCodeTemplate(ruleId: Short) extends ValidationRule(ruleId,
     "Check the primitive type code is supported or is added via soft-fork")
       with SoftForkWhenCodeAdded {
     override protected lazy val settings: SigmaValidationSettings = coreSettings
@@ -93,7 +93,11 @@ object ValidationRules {
     }
   }
 
-  object CheckTypeCode extends ValidationRule(1008,
+  object CheckPrimitiveTypeCode extends CheckPrimitiveTypeCodeTemplate(1007)
+
+  object CheckPrimitiveTypeCodeV6 extends CheckPrimitiveTypeCodeTemplate(1017)
+
+  class CheckTypeCodeTemplate(ruleId: Short) extends ValidationRule(ruleId,
     "Check the non-primitive type code is supported or is added via soft-fork")
       with SoftForkWhenCodeAdded {
     override protected lazy val settings: SigmaValidationSettings = coreSettings
@@ -109,6 +113,10 @@ object ValidationRules {
     }
   }
 
+  object CheckTypeCode extends CheckTypeCodeTemplate(1008)
+
+  object CheckTypeCodeV6 extends CheckTypeCodeTemplate(1018)
+
   object CheckSerializableTypeCode extends ValidationRule(1009,
     "Check the data values of the type (given by type code) can be serialized")
       with SoftForkWhenReplaced {
diff --git a/data/shared/src/main/scala/org/ergoplatform/validation/ValidationRules.scala b/data/shared/src/main/scala/org/ergoplatform/validation/ValidationRules.scala
index 9d4de47a99..9cf5828803 100644
--- a/data/shared/src/main/scala/org/ergoplatform/validation/ValidationRules.scala
+++ b/data/shared/src/main/scala/org/ergoplatform/validation/ValidationRules.scala
@@ -102,7 +102,7 @@ object ValidationRules {
 //    }
   }
 
-  object CheckAndGetMethod extends ValidationRule(1011,
+  class CheckAndGetMethodTemplate(ruleId: Short) extends ValidationRule(ruleId,
     "Check the type has the declared method.") {
     override protected lazy val settings: SigmaValidationSettings = currentSettings
 
@@ -128,6 +128,9 @@ object ValidationRules {
     }
   }
 
+  object CheckAndGetMethod extends CheckAndGetMethodTemplate(1011)
+  object CheckAndGetMethodV6 extends CheckAndGetMethodTemplate(1016)
+
   object CheckHeaderSizeBit extends ValidationRule(1012,
     "For version greater then 0, size bit should be set.") with SoftForkWhenReplaced {
     override protected lazy val settings: SigmaValidationSettings = currentSettings
@@ -171,7 +174,9 @@ object ValidationRules {
     CheckHeaderSizeBit,
     CheckCostFuncOperation,
     CheckPositionLimit,
-    CheckLoopLevelInCostFunction
+    CheckLoopLevelInCostFunction,
+    // v6 validation rules below
+    CheckAndGetMethodV6
   )
 
   /** Validation settings that correspond to the current version of the ErgoScript implementation.
diff --git a/data/shared/src/main/scala/sigma/ast/methods.scala b/data/shared/src/main/scala/sigma/ast/methods.scala
index 4cba72e28d..f3fa1785fb 100644
--- a/data/shared/src/main/scala/sigma/ast/methods.scala
+++ b/data/shared/src/main/scala/sigma/ast/methods.scala
@@ -77,13 +77,17 @@ sealed trait MethodsContainer {
 
   /** Lookup method in this type by method's id or throw ValidationException.
     * This method can be used in trySoftForkable section to either obtain valid method
-    * or catch ValidatioinException which can be checked for soft-fork condition.
+    * or catch ValidationException which can be checked for soft-fork condition.
     * It delegate to getMethodById to lookup method.
     *
     * @see getMethodById
     */
   def methodById(methodId: Byte): SMethod = {
-    ValidationRules.CheckAndGetMethod(this, methodId)
+    if (VersionContext.current.isV6SoftForkActivated) {
+      ValidationRules.CheckAndGetMethodV6(this, methodId)
+    } else {
+      ValidationRules.CheckAndGetMethod(this, methodId)
+    }
   }
 
   /** Finds a method descriptor [[SMethod]] for the given name. */