(a) The governing authority of each county is authorized to provide by local ordinance or resolution for the levy, assessment, and collection of occupation tax on those businesses and practitioners of professions and occupations with no location or office in the state in accordance with this Code section and to provide for the punishment of violation of such a local ordinance or resolution if the business or practitioner:

(1) Has one or more employees or agents who exert substantial efforts within the unincorporated part of the county for the purpose of soliciting business or serving customers or clients; or

(2) Owns personal or real property which generates income and which is located in the unincorporated part of the county.

(b) The governing authority of each municipal corporation is authorized to provide by local ordinance or resolution for the levy, assessment, and collection of occupation tax on those businesses and practitioners of professions and occupations with no location or office in the state in accordance with this Code section and to provide for the punishment of violation of such a local ordinance or resolution if the business or practitioner:

(1) Has one or more employees or agents who exert substantial efforts within the corporate limits for the purpose of soliciting business or serving customers or clients; or

(2) Owns personal or real property which generates income and which is located in the corporate limits.

(c) This article supersedes any provisions of local law or city charter authorizing such taxes.

(d) Local governments levying occupation tax according to this Code section shall comply with Code Sections 48-13-10 through 48-13-13, except that: gross receipts of a business or practitioner for purposes of this Code section shall include only those gross receipts reasonably attributable to sales or services in this state; employees shall include only those employees engaged in substantial efforts within this state; and nation-wide profitability ratios shall apply only to types of business transacted within this state.

(e) Businesses and practitioners subject to this Code section shall be required to pay occupation tax to only one local government in this state, the local government for the municipal corporation or county in which the largest dollar volume of business is done or service is performed by the individual business or practitioner.

(f) If a business or practitioner subject to this Code section provides to the local government in this state which is authorized to levy occupation tax on such business or practitioner proof of payment of a local business or occupation tax in another state which purports to tax the business's or practitioner's sales or services in this state, the business or practitioner shall be exempt from local occupation tax in this state.