D.C. Mun. Regs. tit. 19, § 2411
2411.1 Each non-championship mixed martial arts contest shall be three rounds, of five minutes duration, with a one-minute rest period between each round.
2411.2 Each championship mixed martial arts contest shall be five rounds, of five minutes duration, with a one-minute rest period between each round.
SOURCE: Final Rulemaking published at 54 DCR 7224 (July 27, 2007).