Potential conflicts may arise from the interaction between new multilaterally agreed provisions and similar provisions included in some existing bilateral treaties that fully or partly cover the same subject matter. Such cases raise questions as to whether existing bilateral provisions incorporated in existing tax treaties should remain fully or partially applicable alongside a multilaterally-agreed provision designed to address the same basic questions, and if so under what circumstances and to what extent. From a legal standpoint, the interaction between multilaterally agreed provisions and similar provisions of existing bilateral treaties could be resolved through the inclusion of specific “compatibility” clauses (or “primacy” clauses) in the multilateral instrument.