1. A permit-issuing authority may issue annual permits for the operation of compacted rubbish vehicles and vehicles which transport compacted rubbish from a rubbish collection point to a landfill area, exceeding the weight limitation of section 321.463 but not exceeding twenty thousand pounds per axle, and for tandem axle vehicles or transferrable axle vehicles, not exceeding a gross weight on the rear axles of thirty-six thousand pounds.
2. Vehicles operated pursuant to an annual permit issued under this section shall be operated only over routes designated by the permit-issuing authority.
3. Annual permits approved by the permit-issuing authority shall be issued upon payment of an annual fee, in addition to other registration fees imposed, to be paid to the permit-issuing authority for all nongovernmental vehicles.