“Business Association” means the incorporated organization of persons who operate retail, service, rental, or professional businesses within a particular Retail Business District that provides management services under this subtitle. “Business establishment” means any retail, service, rental, or professional business entity. “Commissioner” means the Commissioner of the Baltimore City Department of Housing and Community Development. “Exempt establishment” means any business establishment which is:operated solely by a federal, state, or local government entity, except for City-owned markets as described in § 11-5(b); operated by a non-profit organization which is not engaged in a retail business; or a parking lot. “Licensable space” means the number of square feet of space in a business establishment subject to the license fee in accordance with the fee calculation method as set forth in a specific Retail Business District Ordinance. “Retail Business District” means a geographic area in Baltimore City, designated by an ordinance under this subtitle, encompassing a concentration of business establishments. City Code, 1976/83, art. 15, §110 Ord. 82-838 Ord. 09-137 Ord. 22-125