Article 4. The effect of civil law in time.
1. Acts of civil law are not retroactive and apply to relations arising after their entry into force. The law applies to relationships that have arisen prior to its entry into force only in cases where it is expressly provided by law. 2. For relations that arose prior to the enactment of an act of civil law, it applies to rights and obligations that arose after its enactment. The relations of the parties under a contract concluded prior to the enactment of an act of civil law shall be regulated in accordance with Article 422 of this Code.
References to other articles of chapter 1. Civil law: