D.C. Mun. Regs. tit. 14, r. 14-905
No old rags, paper, or other like refuse material, gathered or recovered from any sources, shall be brought into or allowed to remain within any building used as a dwelling.
It shall be the duty of the operator of a housing business to maintain the premises, excepting those portions under the exclusive control of the tenant or tenants, free from combustible refuse and debris, accumulated grease, or oil spillage.
The operator of a housing business shall not permit the accumulation or rags, waste paper, broken furniture, or any combustible junk in any portions of the premises under the operator's control.
The tenant of a housing business shall not permit the accumulation of rags, waste paper, broken furniture, or any combustible junk in any portions of the premises under the tenant's control.
D.C. Mun. Regs. tit. 14, r. 14-905