(a) No county or municipal corporation shall levy or collect any fixed amount license, occupation, or professional tax upon real estate brokers, except at the place where any such real estate broker shall maintain a principal or branch office. The license, occupation, or professional tax shall permit the broker and the broker's affiliated associate brokers and salespersons to engage in all of the brokerage activities described in Code Section 43-40-1 without further licensing or taxing other than the state licenses issued pursuant to Chapter 40 of Title 43. No additional license, occupation, or professional tax shall be required of the broker's affiliated associate brokers or salespersons; provided, however, that, subject to the limitations of subsection (b) of this Code section, a municipality or county which levies a general occupation or business license tax on a gross receipts basis shall have the power to levy and collect an occupation, license, or professional tax upon real estate brokers transacting business within the boundaries of the taxing jurisdiction, which tax shall be based upon gross receipts derived from transactions with respect to property located within the boundaries of the taxing jurisdiction.

(b) A municipal corporation may impose an occupation, license, or professional tax upon real estate brokers based upon gross receipts only for real estate transactions with respect to property located within its corporate limits and a county governing authority may impose such a tax based upon gross receipts only for real estate transactions with respect to property located in the unincorporated area of the county.