No license fee shall be imposed under this chapter upon any person engaged in business for solely religious, charitable, or other type of strictly nonprofit purpose, who is tax exempt in such activities under the laws of the United States and the state, nor shall any license fee be imposed on any person engaged in business specifically exempted from municipal taxation and fees by the laws of the United States or the state. (1989 Code § 9-123; amd. 2012 Code)