Utility service lines and pipes shall not be unnecessarily exposed on walls or ceilings in those areas listed in section 271-7.7 of this Subpart. Exposed utility service lines and pipes shall be installed in a way that does not obstruct or prevent cleaning of the walls and ceilings.
N.Y. Comp. Codes R. & Regs. Tit. 1 §§ 271-7.9