Section 31(16)(c) in The Merchant Shipping (Crew Accommodation) Rules, 1960
(c)Access to the water closet pedestal (or washing accommodation, as the case may be) shall be obtained directly from the hospital ward or from a lobby forming part of the hospital. The Central Government may exempt any ship from the requirement of this clause if it is satisfied that compliance therewith is impracticable in the circumstances, and that the water closet forming part of the hospital is situated sufficiently near to the ward.