D.C. Mun. Regs. tit. 25, r. 25-C200
The licensee may employ the services of a swimming pool Management Company to fulfill the requirements of these regulations.
All licensees, pool and spa operators, lifeguards or swimming instructors in charge of, or working at, public swimming pools shall be responsible for the supervision and swimming pool.
The licensee shall ensure that pool and spa operators, lifeguards or swimming instructors possess current first aid training certificates as specified in Subsections 302.3 and 302.4 of these regulations, and that pool and spa operators possess valid certificates issued by the Mayor as required in Subsection 700.4 of these regulations.
A licensee shall ensure that an individual functioning as both a lifeguard and pool and spa operator is in compliance with the requirements identified in Sections 200.3, 300, 301, 302, 304, 412.5, 412.7, 413.1, 704 and 710.3 of these regulations.
A licensee shall ensure swimming pools that are two hundred square feet (200 sq. ft.) in area or greater without an approved diving well configuration post a sign in letters that are four inch (4 in.) (one hundred and two millimeters (102 mm)) in height, which states:
"NO DIVING"
A licensee shall ensure swimming pools where the pool depth is five feet (5 ft.) (1524 mm) or less, a sign displaying "No Diving" symbol shall be posted:
The "No Diving" symbol in Subsection 200.6 or similar symbol shall be posted on the deck at intervals of not more than twenty- five feet (25 ft.) (seven thousand, six hundred and twenty millimeters (7620 mm)).
D.C. Mun. Regs. tit. 25, r. 25-C200