D.C. Code § 7-432: Lifeguards.

(a)

Except as provided in subsection (b) of this section, a lifeguard shall not be required for a Class C, semi-public swimming pool that is:

(1)

Open for use only to persons who hold membership or other paid association in the facility where the swimming pool is located;

(2)

Open for use only to persons who are permanent or temporary residents or guests of residents at the facility where the swimming pool is located;

(3)

Open for use to persons who are lodging for a fee at the facility where the swimming pool is located; or

(4)

A spa pool or sauna.

(b)

A lifeguard shall be required for a Class C, semi-public swimming pool that has:

(1)

A diving board;

(2)

A depth greater than 5 feet; provided, that the swimming pool is constructed after June 30, 2018; or

(3)

An expected bather population that is 50 % or more children under 15 years of age.