A.    The board of supervisors may, by ordinance, establish one or more classes of persons or one or more classes of businesses otherwise subject to payment of a tax imposed by this chapter and provide that such classes of persons or businesses shall be exempt, in whole or in part from such tax.

    B.    No business license under this chapter shall be required of any charitable or nonprofit institution, corporation, organization, or association organized or conducted for nonprofit purposes only, when the receipts derived are to be for the benefit of such organization and not for the private gain of any person. This exemption shall apply to promoters, vendors, and peddlers for events sponsored by nonprofit institutions, corporations, organizations or associations.

    C.    Nonprofit institutions, corporations, organizations, or associations are defined as those entities having nonprofit tax exempt status under state or federal law. (Prior gen. code § 2-200.55)