Duration of order staying or suspending execution of judgment

(a) An order issued pursuant to CPL 460.50 shall contain a statement that, if an appeal has not been perfected within 120 days after the issuance of the order, the operation of such order terminates and the defendant must surrender himself to the criminal court in which the judgment was entered in order that execution of the judgment be commenced or resumed. (b) No extension of the 120-day period specified in CPL 460.50 shall be granted except by the county court.