(a) This section applies to any official or body authorized to issue a license or permit. (b) (1) In this subsection, 'residential zone' means any area in the regional district that is designated on a zoning map as residential. (2) Except as provided in paragraph (3) of this subsection, an official or body may not issue a license or permit for a commercial or industrial purpose or to conduct any commercial or industrial enterprise or business in a residential zone. (3) Paragraph (2) of this subsection does not apply if the purpose, enterprise, or business is allowed by an applicable zoning law under allowed uses or special exceptions granted by a board of appeals.
Maryland Legal Code