(a) The governing body of the county is hereby authorized to levy and impose excise taxes on the storage, use, or other consumption of property in the county as hereinafter provided in this section:

(1) On the storage, use, or other consumption in the county of tangible personal property, not including, however, materials and supplies bought for use in fulfilling a contract for the painting, repairing, or reconditioning of vessels, barges, ships, other watercraft and commercial fishing vessels of over five tons load displacement as registered with the United States Coast Guard and licensed by the State of Alabama Department of Conservation and Natural Resources, purchased at retail on or after the effective date of such tax, for storage, use, or other consumption in the county at the rate of one percent of the sales price of such property or the amount of tax collected by the seller, whichever is greater, except as provided in subdivisions (2), (3), and (4) of this subsection.

(2) On the storage, use, or other consumption in the county of any machines used in mining, quarrying, compounding, processing, and manufacturing of tangible personal property, purchased at retail on or after the effective date of such tax, at the rate of one-half percent of the sales price of any such machine or the amount of tax collected by the seller, whichever is greater; provided, that the term "machine," as herein used, shall include machinery which is used for mining, quarrying, compounding, processing, or manufacturing tangible personal property, and the parts of such machines, attachments, and replacements therefor, which are made or manufactured for use on or in the operation of such machines and which are necessary to the operation of such machines and are customarily so used.

(3) On the storage, use, or other consumption in the county of any automotive vehicle or truck trailer, semitrailer or house trailer, and mobile home set-up materials and supplies including but not limited to steps, blocks, anchoring, cable pipes, and any other materials pertaining thereto, purchased at retail on or after the effective date of such tax, for storage, use, or other consumption in the county at the rate of one-half percent of the sales price of such automotive vehicle, truck trailer, semitrailer or house trailer, and mobile home set-up materials and supplies as specified above, or the amount of tax collected by the seller, whichever is greater. Where any used automotive vehicle or truck trailer, semitrailer or house trailer is taken in trade, or in a series of trades, as a credit or part payment on the sale of a new or used vehicle, the tax levied herein shall be paid on the net difference, that is, the price of the new or used vehicle sold less the credit for the used vehicle taken in trade.

(4) On the storage, use, or other consumption in the county of any machine, machinery, or equipment which is used in planting, cultivating, and harvesting farm products, or used in connection with the production of agricultural produce or products, livestock, or poultry, or farms, and the parts of such machines, machinery, or equipment, attachments and replacements therefor which are made or manufactured for use on or in the operation of such machine, machinery, or equipment, and which are necessary to and customarily used in the operation of such machine, machinery, or equipment, which is purchased at retail after the effective date of the tax, for storage, use, or other consumption in the county, at the rate of one-half percent of the sales price of such property or the amount of tax collected by the seller, whichever is greater. Provided, however, that the one-half percent rate herein prescribed with respect to parts, attachments, and replacements shall not apply to any automotive vehicle or trailer designed primarily for public highway use except farm trailers used primarily in the production and harvesting of agricultural commodities.

(b) There are exempted from the provisions of this section, and from the taxes authorized to be imposed by this section, the storage, use, or other consumption of property the storage, use, or other consumption of which is presently exempted under the state use tax statutes from the state use tax. Subject to those exemptions, every person storing or using or otherwise consuming in the county tangible personal property purchased at retail on or after the effective date of any such taxes imposed pursuant to the authorization contained in this section shall be liable for the taxes so imposed, and the liability shall not be extinguished until the tax has been paid by such person; provided, however, that a receipt from a retailer maintaining a place of business in the county given to the purchaser or other receipt or documentation regarding payment of tax permitted under applicable rules and regulations, shall be sufficient to relieve the purchaser from further liability for tax to which such receipt or documentation may refer.