IRP registration and yearly IRP renewals are required for any commercial vehicle weighing more than 26,000 pounds and traveling between two or more jurisdictions.
So if you travel or plan to travel between jurisdictions you must have up-to-date IRP registration.
Upcoming registration IRP renewal deadlines
In many jurisdictions, you must apply for IRP renewal at least 30 days ahead of the deadline. Most jurisdictions will send you a reminder ahead of the deadline but if you do not receive a notification it is still your responsibility to apply on time.