Ariz. Rev. Stat. § 28-2003
A. The following fees are required:
7. For the registration of a trailer or semitrailer that is not a travel trailer and that exceeds ten thousand pounds declared gross weight:
(b) On renewal of registration or if previously registered in another state, a onetime fee of:
8. For the registration of a noncommercial trailer that is not a travel trailer and that is ten thousand pounds or less declared gross weight:
B. For the purposes of this section:
2. "Travel trailer" means a trailer that is: