D.C. Code § 43-124
No person shall, in the District of Columbia, build or maintain a crematory or other device for destroying human bodies, except within the limits of some duly-established cemetery in said District unless such person or persons has in writing the consent of the owners of more than one-half of the property within a radius of 200 feet from the place where such crematory is to be erected and maintained and a permit from the Mayor of said District for the erection and maintenance of such crematory or other device; such permit to be for a term of years, not exceeding 5, to be specified therein; provided, that this section shall not apply to such crematories or other devices for destroying human bodies as may have been erected and were in operation on March 3, 1901.
D.C. Code § 43-124