Maryland Code, Transportation § 13-930

(a) In this section, “farm trailer or semitrailer” means a farm vehicle that is a Class G (trailer) vehicle.

(b) On application, the Administration shall issue a special Class G “farm trailer or semitrailer” registration to any applicant who certifies:

(c) 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:

(d) A vehicle registered under this section may not be used for hire except to haul farm products for another farmer.

(e) A vehicle registered under this section may not be used in any manner other than as a farm trailer or semitrailer.