In addition to the definitions provided under A.R.S. §§ 28-4001, 28-4031, 28-5201, and 28-5431, the following terms apply to
this Article, unless the context otherwise requires:
"Binder" means a contract for temporary insurance as described in A.R.S. § 20-1120.
"Initial motor vehicle registration" means the first time a motor carrier registers a specific motor vehicle or a vehicle combination in Arizona.
"Insurance company" means an entity that is in the business of issuing motor carrier liability insurance policies.
Ariz. Admin. Code § R17-5-501