Except when required as a special exception by Subtitle K § 412 or not permitted by this section, accessory uses, buildings, or structures customarily incidental and subordinate to the principal uses permitted in Subtitle K § 410 shall be permitted in the HE zones as a matter of right subject to any limitations of this subtitle.
Parking as an accessory use shall be permitted except that at-grade accessory surface parking lots shall not be permitted.
D.C. Mun. Regs. tit. 11, r. 11-K414