Any person who installs a smoke detector shall comply with the requirements of this subchapter and the National Fire Protection Association Standards 72-E and 74 (1974 Edition). In the event of a conflict between this subchapter and the National Fire Protection Association Standards 72-E and 74 (1974 Edition), this subchapter takes precedence.
Other applicable standards
D.C. Code § 6-751.08 — under Smoke Detectors..
D.C. Code § 6-751.08