N.Y.C. Admin. Code § 14-131: § 14-131 Accommodations for women.

The commissioner shall designate one or more station houses for the detention and confinement of women under arrest in the city. The commissioner shall provide sufficient accommodations for women held under arrest, keep them separate and apart from the cells, corridors and apartments provided for males under arrest, and so arrange each station house that no communication can be had between men and women therein confined, except with the consent of the officer in command of such station house. Officers or employees other than female staff assigned to this detail, shall be admitted to the corridors or cells of the women prisoners only with the consent of the officer in command of such station house. In every station house to which female members of the force or other female staff are detailed, toilet accommodations shall be provided for female staff, which accommodations shall be wholly separate and apart from the toilet accommodations provided for prisoners, or for male personnel attached to such station house.