Amends existing law to revise provisions regarding temporary license plates and certain exempt vehicle license plates.

This legislation has two parts. Both parts seek to align existing concepts in statute currently. 1. It removes the requirement for exempt agency trailers and motorcycles to receive a small plate with an 'A' designator and an 'M' designator, respectively. Exempt agencies will instead have the option to receive a small or large (regular) size plate with the appropriate agency designator, making the plates more identifiable to which agency they belong. Additionally, trailer manufacturing standards often provide brackets for attaching a large size plate. With a large plate option, exempt agencies will no longer need any aftermarket modifications to attach a small size plate. 2. It clarifies that temporary permits, often referred to as trip permits, are required to be purchased before commercial vehicles enter the state in all situations, not just in some circumstances. This will align Idaho with many other states in the country, and it will also align commercial vehicles and passenger vehicle requirements.