3) amendment or abolition of the act of the state body, on the basis of which the agreement was concluded.
3. A unilateral rescission of performance of an agreement shall be allowed in the cases when the agreement is entered into without indication of a period, unless it is otherwise provided for by legislative acts or the consensus of the parties.
4. In the case of a unilateral rescission of the performance of an agreement the party must notify the other accordingly, not later than one month prior, unless it is otherwise provided for by this Code, other legislative acts or consensus of the parties.
Article 405. Extension of the Validity Period of an Agreement
The parties shall have the right to extend the validity period of the agreement for another period.
The extension of the validity period of an agreement shall be carried out in accordance with the rules of Article 397 of this Code.