D.C. Mun. Regs. tit. 22, r. 22-B8599
When used in this chapter, the following terms and phrases shall have the meaning ascribed:
Harassment - Conduct directed at an employee solely on the basis of his/her affectional preference, age, color, creed, disability, national origin, race, religion, sexual orientation or other basis prohibited by law which would lead an employee to reasonably believe that the conditions of employment are altered and that the work environment is hostile or abusive.
Sexual harassment - Unwelcome sexual advances, requests for sexual favors, and other verbal or physical contact of a sexual nature constitute sexual harassment when submission to such conduct is made either explicitly or implicitly a term or condition of an individual's employment. Submission to, or rejection of, such conduct by an individual is used as the basis for employment decisions affecting such individual. Such conduct, or conduct directed against an employee because of his/her sex would lead an employee to reasonably believe that the conditions of employment are altered.
D.C. Mun. Regs. tit. 22, r. 22-B8599