Section 64(3)(d) in The U.P. Factories Rules, 1950
(d)If female workers are employed, separate washing facilities shall be provided and so enclosed or screened that the interiors are not visible from any place, where persons of the other sex work or pass. The entrance to such facilities shall bear conspicuous notice in the language understood by the majority of the workers "For women only" and shall also be indicated pictorially.