D.C. Code § 1-306.43: Street or alley closings or zoning density increases associated with housing trust fund contributions.

An applicant who obtains a street or alley closing or a zoning density increase who is required to contribute funds to a housing trust fund pursuant to this part shall proceed in accordance with the following schedule:

(1)

Not less than 1/2 of the required total contribution shall be made prior to the issuance of a building permit for any of the commercial development; and

(2)

The balance of the required total contribution shall be made prior to the issuance of a certificate of occupancy for any of the commercial development.