Notwithstanding any provision of law or rule of court to the contrary, throughout the State of New York the sessions of the Supreme Court, Court of Claims, County Court, Surrogate's Court, Family Court, Civil Court of the City of New York, Criminal Court of the City of New York, City Courts and District Courts, for the disposition of business before the court shall commence not later than 9:30 a.m. and conclude not earlier than 5 p.m. Where warranted, the Chief Administrator of the Courts may authorize variances in the opening and closing hours of the courts, but, in such event, daily sessions shall total not less than six hours.