D.C. Mun. Regs. tit. 24, r. 24-1200
Except as provided for in § 1200.2, this section shall be applicable to only the following historic districts:
Residents in an historic district not listed in § 1200.1 may petition the Director to list the historic district in § 1200.1. The Director, in consultation with the State Historic Preservation Officer for the District of Columbia, shall review the petition to determine whether this section shall be amended to include the historic district and shall take the appropriate action.
The pavement materials for new sidewalk installation on a street zoned R or SP in an historic district shall be brick and sand.
The pavement material for new sidewalk installation on a street zoned for commercial purposes in an historic district shall be brick on concrete.
The abutting property owners shall be assessed the cost of new sidewalk installation performed pursuant to §§ 1200.3 and 1200.4 in the manner specified by D.C. Code § 7-601 et seq. (1981).
If the area to be repaired on a sidewalk on a street zoned R or SP in an historic district is twenty feet (20 ft.) or more in length and the full width of the sidewalk, the Department shall repair the sidewalk with brick on sand.
If the area to be repaired on a sidewalk on a street zoned R or SP in an historic district is less than twenty feet (20 ft.) and the full width of the side walk, the Department shall repair the sidewalk with in-kind paving materials.
If the area to be repaired on a sidewalk on a street zoned for commercial purposes in an historic district is twenty feet (20 ft.) or more in length and the full width of the sidewalk, the Department shall give notice to the abutting property owner(s) that the Department intends to repair the abutting sidewalk in not less than (30) days. This would be done to afford the property owners an opportunity to upgrade the sidewalk.
Within thirty (30) days of the notice given pursuant to § 1200.8, the abutting property owner may notify the Department in writing of the owner's requested pavement material, either brick on concrete or the existing pavement material, and shall inform the Department whether that property owner agrees to share in the cost of repairing the sidewalk with brick on concrete.
The Department shall review the request(s) and shall finally determine which paving material shall be used based on the appropriateness, availability, and cost of the pavement materials, and based on any other pertinent factors. This determination shall be made within thirty (30) days of the date of receipt of the request.
If the area to be repaired on a sidewalk on a street zoned for commercial purposes in an historic district is less than twenty feet (20 ft.), and the full width of the sidewalk, the Department shall repair the sidewalk with in-kind paving materials.
For streets located in an historic district which have a mix of commercial and residential uses, or which are located in a waterfront zone, the Director shall determine, based on the primary character of the streets, which subsection of this section most appropriately applies to the streets.
This section shall not apply to sidewalks in the Downtown Urban Renewal Area.
D.C. Mun. Regs. tit. 24, r. 24-1200