In this section, “farm truck tractor” means a farm vehicle that is a Class F (tractor) vehicle. On application, the Administration shall issue a Class F “farm truck tractor” registration to any applicant who certifies: That the applicant is a farmer; and That the vehicle for which the application is made is a farm truck tractor, specifying its proposed use. For each farm truck tractor the annual registration fee is based on the maximum gross weight of the vehicle in combination with a trailer or semitrailer, as follows: Maximum Gross Weight          Fee (per 1,000 Pounds Limit (in Pounds)               or Fraction Thereof) 40,000 (minimum) 80,000 (maximum)              $5.25 A vehicle registered under this section may not be used for hire except to haul farm products for another farmer. A vehicle registered under this section may not be used in any manner other than as a farm truck tractor.