diff --git a/core/config.mk b/core/config.mk
index a286769..1bbb78c 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -678,33 +678,22 @@
   PRODUCT_USE_VNDK := $(PRODUCT_FULL_TREBLE)
 endif
 
-# Define PRODUCT_PRODUCT_VNDK_VERSION if PRODUCT_USE_VNDK is true and
-# PRODUCT_SHIPPING_API_LEVEL is greater than 29.
-PRODUCT_USE_PRODUCT_VNDK := false
 ifeq ($(PRODUCT_USE_VNDK),true)
-  ifneq ($(PRODUCT_USE_PRODUCT_VNDK_OVERRIDE),)
-    PRODUCT_USE_PRODUCT_VNDK := $(PRODUCT_USE_PRODUCT_VNDK_OVERRIDE)
-  else ifeq ($(PRODUCT_SHIPPING_API_LEVEL),)
-    # No shipping level defined
-  else ifeq ($(call math_gt,$(PRODUCT_SHIPPING_API_LEVEL),29),true)
-    PRODUCT_USE_PRODUCT_VNDK := true
-  endif
-
   ifndef BOARD_VNDK_VERSION
     BOARD_VNDK_VERSION := current
   endif
-
-  ifeq ($(PRODUCT_USE_PRODUCT_VNDK),true)
-    ifndef PRODUCT_PRODUCT_VNDK_VERSION
-      PRODUCT_PRODUCT_VNDK_VERSION := current
-    endif
-  endif
 endif
 
 $(KATI_obsolete_var PRODUCT_USE_VNDK,Use BOARD_VNDK_VERSION instead)
 $(KATI_obsolete_var PRODUCT_USE_VNDK_OVERRIDE,Use BOARD_VNDK_VERSION instead)
-$(KATI_obsolete_var PRODUCT_USE_PRODUCT_VNDK,Use PRODUCT_PRODUCT_VNDK_VERSION instead)
-$(KATI_obsolete_var PRODUCT_USE_PRODUCT_VNDK_OVERRIDE,Use PRODUCT_PRODUCT_VNDK_VERSION instead)
+
+ifdef PRODUCT_PRODUCT_VNDK_VERSION
+  ifndef BOARD_VNDK_VERSION
+    # VNDK for product partition is not available unless BOARD_VNDK_VERSION
+    # defined.
+    $(error PRODUCT_PRODUCT_VNDK_VERSION cannot be defined without defining BOARD_VNDK_VERSION)
+  endif
+endif
 
 # Set BOARD_SYSTEMSDK_VERSIONS to the latest SystemSDK version starting from P-launching
 # devices if unset.
diff --git a/core/product_config.mk b/core/product_config.mk
index 38926c2..6170b5b 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -358,6 +358,12 @@
 $(KATI_obsolete_var OVERRIDE_PRODUCT_EXTRA_VNDK_VERSIONS \
     ,Use PRODUCT_EXTRA_VNDK_VERSIONS instead)
 
+# If build command defines OVERRIDE_PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE,
+# override PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE with it unless it is
+# defined as `false`. If the value is `false` clear
+# PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE
+# OVERRIDE_PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE can be used for
+# testing only.
 ifdef OVERRIDE_PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE
   ifeq (false,$(OVERRIDE_PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE))
     PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE :=
@@ -367,11 +373,35 @@
 else ifeq ($(PRODUCT_SHIPPING_API_LEVEL),)
   # No shipping level defined
 else ifeq ($(call math_gt,$(PRODUCT_SHIPPING_API_LEVEL),29),true)
+  # Enforce product interface if PRODUCT_SHIPPING_API_LEVEL is greater than 29.
   PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE := true
 endif
 
 $(KATI_obsolete_var OVERRIDE_PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE,Use PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE instead)
 
+# If build command defines PRODUCT_USE_PRODUCT_VNDK_OVERRIDE as `false`,
+# PRODUCT_PRODUCT_VNDK_VERSION will not be defined automatically.
+# PRODUCT_USE_PRODUCT_VNDK_OVERRIDE can be used for testing only.
+PRODUCT_USE_PRODUCT_VNDK := false
+ifneq ($(PRODUCT_USE_PRODUCT_VNDK_OVERRIDE),)
+  PRODUCT_USE_PRODUCT_VNDK := $(PRODUCT_USE_PRODUCT_VNDK_OVERRIDE)
+else ifeq ($(PRODUCT_SHIPPING_API_LEVEL),)
+  # No shipping level defined
+else ifeq ($(call math_gt,$(PRODUCT_SHIPPING_API_LEVEL),29),true)
+  # Enforce product interface for VNDK if PRODUCT_SHIPPING_API_LEVEL is greater
+  # than 29.
+  PRODUCT_USE_PRODUCT_VNDK := true
+endif
+
+ifeq ($(PRODUCT_USE_PRODUCT_VNDK),true)
+  ifndef PRODUCT_PRODUCT_VNDK_VERSION
+    PRODUCT_PRODUCT_VNDK_VERSION := current
+  endif
+endif
+
+$(KATI_obsolete_var PRODUCT_USE_PRODUCT_VNDK,Use PRODUCT_PRODUCT_VNDK_VERSION instead)
+$(KATI_obsolete_var PRODUCT_USE_PRODUCT_VNDK_OVERRIDE,Use PRODUCT_PRODUCT_VNDK_VERSION instead)
+
 define product-overrides-config
 $$(foreach rule,$$(PRODUCT_$(1)_OVERRIDES),\
     $$(if $$(filter 2,$$(words $$(subst :,$$(space),$$(rule)))),,\