District of Columbia Code Division VIII. General Laws. § 47-2853.05. Exemptions; federal services.

Any person who is providing occupational or professional services for the federal government at a federal government facility in the District shall not be regulated under this subchapter. Any person who has a license or certificate issued by the federal government permitting that person to provide particular occupational or professional services may provide such services in the District of Columbia without obtaining a District license or certificate as long as the services provided by that person are within the scope of the federal license or certificate.