D.C. Mun. Regs. tit. 19, § 2317
2317.1 A contestant shall execute a sweep only by making a sweeping motion with the padded area of the kicking foot, such that only the padded area could strike the opponent.
2317.2 After a successful sweep, a contestant shall not execute any further technique against an opponent if any part of the opponent's body, except the feet, is touching the floor.
SOURCE: Final Rulemaking at 35 DCR 3759, 3765 (May 20, 1988).