D.C. Code § 28-3603

As used in this chapter, “finance charge” and “annual percentage rate” shall have the respective meanings under the provisions of the Truth-in-Lending Act (82 Stat. 146 et seq.; 15 U.S.C. 1601 et seq.) and the regulations and interpretations thereunder; and “federally insured bank or savings and loan association” means an insured bank as defined in section 3 of the Federal Deposit Insurance Act or an “insured institution” as defined in section 401 of the National Housing Act.