According to Article 466 of Civil Code:
1. Amendment and rescission of a contract shall be possible upon the agreement of parties, unless otherwise provided for by law or the contract.
2. A contract may, upon the request of one of the parties, be amended or rescinded through a court judgment solely in case of an essential violation of the contract by the other party or in other cases provided for by law or the contract.
Violation of a contract made by one of the parties shall be recognised as essential, where it results in such damage for the other party that deprives the latter of whatever that party might be entitled to expect while entering into a contract.
3. In case of unilaterally refusing, in full or in part, to perform a contract, where renunciation from a contract is permitted by law or agreement of parties, the contract shall respectively be considered rescinded or amended.
