In this section, “farm trailer or semitrailer” means a farm vehicle that is a Class G (trailer) vehicle. On application, the Administration shall issue a special Class G “farm trailer or semitrailer” 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 trailer or semitrailer, specifying its proposed use. Except as otherwise provided in this part, for each farm trailer or semitrailer, the annual registration fee is based on the maximum gross weight limitations for the vehicle, as follows: Maximum Gross Weight Limit (in Pounds)                        Fee 3,000                           $ 12.75 5,000                            25.50 10,000                           40.00 20,000                           62.00 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 trailer or semitrailer.