District of Columbia Code Division I. Government of District. § 7-2871.01. Definitions.

(1) “Athlete” means a person who engages in athletic activity who is 18 years old or younger.

(2) “Athletic activity” means a program or event, including practice and competition, organized as part of a school-sponsored, interscholastic-athletic program, an athletic program sponsored by the Department of Parks and Recreation, or an athletic program under the auspices of a nonprofit or for-profit organization. The term “athletic activity” includes participation in physical education classes that are part of a school curriculum.

(3) “Concussion” means a traumatic injury to the brain causing a change in a person's mental status at the time of the injury, such as feeling dazed, disoriented, or confused, which may or may not involve a loss of consciousness, resulting from:

(4) “School” means a public school operated under the authority of the Mayor and any charter, parochial, or private school in the District.