D.C. Code § 42-3507.01
No housing provider shall substantially rehabilitate, demolish, or discontinue any housing accommodation unless there has first been served upon each tenant residing in the housing accommodation a written notice of intent to rehabilitate, demolish, or discontinue the housing accommodation in accordance with § 42-3505.01(f), (g), (h), or (i), as appropriate. The notice shall advise the tenants of their right to relocation assistance under this chapter or any other District law, and the procedures for applying for the assistance. The Rental Housing Commission shall prescribe the content of the notice. No tenant may be evicted from a housing accommodation which the housing provider intends to substantially rehabilitate, demolish, or discontinue housing use, or which the housing provider intends to sell to another person who, to the housing provider's knowledge, intends to substantially rehabilitate, demolish, or discontinue housing use, unless the requirements of this section have been met. Nothing contained in this section shall be construed to limit a housing provider's right to evict a tenant for nonpayment of rent or violation of an obligation of the tenancy, if the action to evict is in compliance with § 42-3505.01.
D.C. Code § 42-3507.01