The County Commission of Chambers County may levy, in addition to all other taxes presently levied, an additional sales and use tax not to exceed the highest municipal rates collected in the county. These additional rates shall be as follows: General sales, sales and use tax rate of a rate equal to the highest municipal rate collected on April 14, 2006; automobile sales and use rate of two percent; agricultural machinery sales and use tax of two percent; and manufacturing machine sales and use tax rate of two percent. Except as herein provided, these rates shall apply only in the areas in the county outside the corporate limits of Lanett, Valley, LaFayette, Waverly, and Five Points as determined on April 14, 2006. These rates shall also apply to the area of the county which constitutes the police jurisdiction for a municipality located outside the county provided the municipality has a sales and use tax in effect in the police jurisdiction in the county on April 14, 2006. The additional sales and use tax rates in the county outside the corporate limits of Lanett, Valley, LaFayette, Waverly, and Five Points, as determined on April 14, 2006, but within the respective police jurisdiction of Lanett, Valley, LaFayette, Waverly, or Five Points, shall be only one-half the corresponding municipal rates of the municipality having jurisdiction. The gross receipts of any business and the gross proceeds of all sales, which are presently exempt under the state sales and use tax statutes, are exempt from the tax authorized by this part.