D.C. Mun. Regs. tit. 31, § 818
818.1 No public vehicle for hire operator, company, association, or fleet shall discriminate on the basis of any protected characteristic or trait, including race, color, religion, national origin, sex, age, marital status, personal appearance, sexual orientation, gender identity or expression, family status, family responsibility, genetic information, political affiliation, disability, matriculation, or source of income, or place of residence or business.
818.2 Discriminatory conduct prohibited by this section includes, but is not limited to, the following:
(a) Not picking up a passenger on the basis of any protected characteristic or trait, including not picking up a passenger with a service animal;
(b) Requesting that a passenger get out of a taxicab on the basis of a protected characteristic or trait;
(c) Using derogatory or harassing language on the basis of a protected characteristic or trait;
(d) Refusing a telephone or digital dispatch to a specific geographic area of the District; and
(e) Using dynamic street hail pricing in any manner that constitutes prohibited discrimination under this section or other applicable law.
SOURCE: Final Rulemaking published at 46 DCR 5941, 5942 (July 16, 1999); as amended by Final Rulemaking published at 59 DCR 9970, 9980 (August 17, 2012); as amended by Final Rulemaking published at 65 DCR 1870 (February 23, 2018).