What documents must a vehicle owner present during a state inspection?

During a state inspection, a vehicle owner must present both the vehicle registration and proof of insurance. The registration document verifies that the vehicle is legally registered with the state, indicating that it has been properly titled and meets all relevant legal requirements. Proof of insurance demonstrates that the vehicle owner has the required insurance coverage, which is vital for operating the vehicle legally on public roads.

Having these documents ensures that the inspection can be conducted legally, confirming that the vehicle is not only safe for operation but also that the owner is compliant with state laws regarding vehicle ownership and financial responsibility. Other documents mentioned in the options, while they may be relevant in different contexts, do not fulfill the specific requirements for a vehicle inspection in the state of Maine.