Arizona Revised Statutes Title 28. Transportation § 28-5435. Increase in gross vehicle weight; additional fee

A. A person may increase the declared gross weight of a vehicle or vehicle combination after the original registration and during the registration year by reregistration of the vehicle or vehicle combination. The person shall pay a fee in addition to the gross weight fee prescribed in this article based on the difference between the fee due at the time of reregistration for the weight class in which the vehicle or vehicle combination was originally registered and the fee due at the time of reregistration for the increased weight class. If during a registration year the declared gross weight of a vehicle or vehicle combination is reduced, there is no reduction or refund allowed for a part of the original weight fee previously paid.

B. A vehicle or vehicle combination that is operated under a special permit allowing excess weight pursuant to § 28-1103 is not required to declare an increased gross weight or to pay a fee ascribed to the increased gross weight pursuant to this article.