Article 422. Contract and Law.
1. A contract must comply with the rules binding on the parties, established by law and other legal acts (imperative norms) in force at the time of its conclusion. 2. If, after the conclusion of the contract, a law has been adopted, which establishes binding rules for the parties other than those that were valid during the conclusion of the contract, the conditions of the concluded contract shall remain in force, unless the law determines that its effect applies to relations arising from of contracts.
Links to other articles of chapter 27. The concept and terms of the contract: