D.C. Code § 36-621.17: Conflict with federal law.

Nothing in this subchapter shall be construed to authorize noncompliance with any provision of any federal law or regulation. Notwithstanding any provision in this subchapter, no sports wagering, or gambling in any form, or the operation of gambling devices shall be allowed on federal property, or portion of federal property, where such activity is prohibited by federal law or regulation or is contrary to § 1-206.02(a)(3).