Except as provided in §C of this regulation, an operator shall ensure that: Toilet facilities are constructed, located, and maintained to prevent a: Nuisance; or Public health hazard; For residential camps, one toilet is provided for each 15 campers or fraction of 15 campers; For day camps, one toilet is provided for each 35 campers or fraction of 35 campers; If separate toilet facilities for boys and girls are in the same building, the facilities: Are separated by a solid wall from floor to roof or ceiling; and Have self-closing doors or another means that affords privacy; If separate toilet facilities are provided for boys and girls, they are distinctly marked “boys” and “girls” in: Universal symbols; or The native language of the campers expected to use the facility; Toilet tissue on a holder is furnished adjacent to a toilet; A toilet facility has adequate: Mechanical exhaust; or Natural ventilation; and A toilet facility is located within 300 feet of each housing unit. An operator may substitute urinals constructed of non-absorbent materials for boys' toilets on the basis of one urinal for one toilet up to a maximum of 1/3 of those facilities required. Sections A and B of this regulation do not apply to a primitive camp.