Except as provided in §B of this regulation, an owner shall ensure that a recreational pool, semipublic pool, or public spa has: A bathhouse, toilets, hand sinks, and showers within 100 feet of an entrance gate to the pool or spa in accordance with the American National Standard for Public Swimming Pools, Articles 19.1—19.6.13; At least a minimum number of toilets, hand sinks, and showers based on: The maximum user load of the pool or spa set forth in Regulation .19 of this chapter; Fixture ratios set forth in §A(1) of this regulation; and State and local building codes; 50 percent of the required fixtures designated for use by each sex, unless the pool or spa is for one sex only; and At least 50 percent of the required showers located within a bathhouse. An owner is not required to provide toilet, hand sink, and shower facilities at a recreational pool, semipublic pool, or public spa when bathers have access to equivalent facilities in: Living quarters not more than 500 feet from a pool or a spa entrance; or A building or buildings not more than 500 feet from a pool or a spa entrance. An owner shall ensure that equivalent facilities used by recreational pool, semipublic pool, or public spa bathers and patrons of a recreational center, health club, marina, or other facility are in compliance with: Section A of this regulation; and State or local plumbing codes regarding fixtures and dressing area for the patrons sharing the equivalent facilities.