Article 420.

1. An agreement between two or more persons to establish, modify or terminate civil rights and obligations shall be recognized by the treaty. 3. General provisions on obligations are applicable to obligations arising from the treaty (arts. 307-41). (9) Except as otherwise provided in the rules of this chapter and the rules on certain types of contracts contained in this Code. Treaty agreements shall apply if this is not contrary to the multilateral character of such treaties.