Under what circumstance can a driver legally operate a vehicle without a seatbelt in Nevada?

In Nevada, drivers are legally exempt from wearing a seatbelt when they are in a vehicle that was not manufactured with seatbelts. This scenario acknowledges that some older vehicles were produced before seatbelt laws were established, hence not all vehicles are equipped with this safety feature. The law recognizes that it wouldn't be reasonable or enforceable to mandate seatbelt use in vehicles where they are unavailable.

The other options do not align with Nevada's seatbelt laws. Driving a rental car does not provide an exemption from the seatbelt requirement, as all vehicles, regardless of ownership, must comply with the state's safety regulations. Similarly, the condition regarding air conditioning does not impact the seatbelt law—safety must always be prioritized in every situation, regardless of the vehicle's internal systems. Finally, the vehicle's speed alone does not determine seatbelt use; even at lower speeds, the law mandates seatbelt usage for the safety of all passengers.