Provided, however, that this subtitle shall not apply to or affect any dealer having an established place of business within the City of Baltimore. Nor shall it apply to or affect any person, firm, or corporation who sells exclusively to or through, or who buys exclusively from, a duly accredited wholesale food establishment that is licensed and complies with the requirements, as such, of the City of Baltimore, and State of Maryland. City Code, 1950, art. 19, §67(a) 1966, art. 15, §84(a) 1976/83, art. 15, §102(a)(2nd cl.) Ord. 33-449