The NYPD is going “old school” when it comes to the facial hair and uniforms of police officers, according to a new video obtained by The Post.

The city’s largest police union has sent a cease and desist letter to the NYPD, demanding it rescind its planned changes to its grooming and appearance standards, the Daily News has learned.

— -- New York City police officials are now recommending that academy trainees not wear their uniforms in public, or any other clothing associating them with the NYPD. The cadets have been ...