D.C. Mun. Regs. tit. 11, r. 11-2916
One hundred percent (100%) of the ground floor H Street frontage of building units shall be occupied by the preferred uses listed in §§ 1710 and 1711, except for space devoted to building entrances or lobbies, space required to be devoted to fire control, or space dedicated to transit or rail entrances or passenger circulation.
Banks or financial institutions identified in § 1710.1(h) shall occupy no more than one hundred (100) total linear feet of ground floor H Street frontage, and no more than fifty feet (50 ft.) of ground floor H Street frontage in any one building unit.
No single commercial occupancy shall occupy more than one hundred (100) total linear feet of ground floor H Street frontage.
The entire ground floor of all building units shall have a minimum slab to slab height of fourteen feet (14 ft.), except for those spaces within the ground floor of any building unit devoted to the following uses: mechanical, electrical, and plumbing; storage; fire control; loading; and retail corridors and service corridors.
D.C. Mun. Regs. tit. 11, r. 11-2916