creo4 config.pro option documentation for: ADD_MERGE_ENT_TO_RULBASED_LAYER 
add_merge_ent_to_rulbased_layer
yes
*
, no
Controls populating the copy of rule-based layer on target models by copy entities of the layer from the source model.
yes
*
- Populates the rule-based layer in the target model by copies of entities of the layer from the source model.
no
- Does not populate the rule-based layer in the target model by copies of entities of the layer from the source model.