D.C. Mun. Regs. tit. 11, r. 11-C713
All parking areas, including access aisles, driveways, and ramp areas, shall be surfaced and maintained with an all-weather surface. In addition to traditional impervious surfaces, allowable all-weather surfaces include porous (or pervious) concrete, porous asphalt, and mechanically reinforced grass. Gravel and grass that is not mechanically reinforced are not allowed as surface materials required under this subsection.
All parking spaces shall be clearly striped according to the dimensions specified in Subtitle C § 712. Durable all-weather materials shall be used for striping. Striping shall be maintained for as long as the parking spaces are in use.
A parking lot serving a use in the retail or eating and drinking establishment use category shall provide at least one (1) litter receptacle within the parking area.
D.C. Mun. Regs. tit. 11, r. 11-C713