Age limits for the appointment of police officers are a recognized exception to the general prohibition of age discrimination by entities governed by the Civil Service Law, and have been expressly sanctioned (Knapp v Monroe County Civ. Serv. Commn., 77 AD2d 817, appeal dismissed 51 NY2d 877). Concur—Kupferman, J. P., Milonas, Asch, Wallach and Rubin, JJ.