D.C. Mun. Regs. tit. 31, § 1318
1318.1 A taximeter business owner, while performing his duties and responsibilities as a licensee, shall not:
(a) Threaten, harass, or abuse any governmental or Commission representative, public servant, or other person; and
(b) Use or attempt to use any physical force against a Commission representative, public servant or any other person.
SOURCE: Final Rulemaking published at 55 DCR 3831 (April 11, 2008).