(A) The maximum tax imposed by this chapter is three hundred dollars for each sale made after June 30, 1984, or lease executed after August 31, 1985, of each:

1. (1) aircraft, including unassembled aircraft which is to be assembled by the purchaser, but not items to be added to the unassembled aircraft;
2. (2) motor vehicle;
3. (3) motorcycle;
4. (4) boat;
5. (5) trailer or semitrailer, pulled by a truck tractor, as defined in Section 56-3-20, and horse trailers but not including house trailers or campers as defined in Section 56-3-710;
6. (6) recreational vehicle, including tent campers, travel trailer, park model, park trailer, motor home, and fifth wheel; or

7. (7) self-propelled light construction equipment with compatible attachments limited to a maximum of one hundred sixty net engine horsepower.

   In the case of a lease, the total tax rate required by law applies on each payment until the total tax paid equals three hundred dollars. Nothing in this section prohibits a taxpayer from paying the total tax due at the time of execution of the lease, or with any payment under the lease. To qualify for the tax limitation provided by this section, a lease must be in writing and specifically state the term of, and remain in force for, a period in excess of ninety continuous days.

(B) For the sale of a manufactured home, as defined in Section 40-29-20, the tax is calculated as follows:

1. (1) subtract trade-in allowance from the sales price;
2. (2) multiply the result from (1) by sixty-five percent;
3. (3) if the result from (2) is no greater than six thousand dollars, multiply by five percent for the amount of tax due;

4. (4) if the result from (2) is greater than six thousand dollars, the tax due is three hundred dollars plus two percent of the amount greater than six thousand dollars.

   However, a manufactured home is exempt from any tax that may be due above three hundred dollars as a result of the calculation in item (4) if it meets these energy efficiency levels: storm or double pane glass windows, insulated or storm doors, a minimum thermal resistance rating of the insulation only of R-11 for walls, R-19 for floors, and R-30 for ceilings. However, variations in the energy efficiency levels for walls, floors, and ceilings are allowed and the exemption on tax due above three hundred dollars applies if the total heat loss does not exceed that calculated using the levels of R-11 for walls, R-19 for floors, and R-30 for ceilings. The edition of the American Society of Heating, Refrigerating, and Air Conditioning Engineers Guide in effect at the time is the source for heat loss calculation. The dealer selling the manufactured home must maintain records, on forms provided by the State Energy Office, on each manufactured home sold which contains the above calculations and verifying whether or not the manufactured home met the energy efficiency levels provided for in this subsection. These records must be maintained for three years and must be made available for inspection upon request of the Department of Consumer Affairs or the State Energy Office.