§ 469. Continuance where attorney is member of legislature. When a party to a civil action or proceeding shows by his or his attorney's affidavit that his attorney is a member of the legislature of the state of New York, that the legislature is in regular or special session or that not more than ten days have elapsed since the adjournment sine die of such session, that such attorney is the only one employed by the party who is prepared to try the cause, and that due to the performance of his legislative duties he is then unable to try the cause, the court shall grant a stay of the trial without prejudice to its place on the calendar, provided that no such stay shall extend to more than ten days after the adjournment sine die of the session of the legislature.