The tag weight limit is based to your driver license status. Tag weight registered over 26,000 you'll need Class B CDL. Combo Tractor and trailer over 26,000lbs. you'll need Class A CDL.
I went to Raleigh HQ DMV because they have experience dealing with MVs. They'll run you through as if you're registering your daily driving vehicle. All they ask is weight limit you need. Stay under 26,000 to use typical Class C drivers licenses.
Also private business contractors run some of the smaller NC DMV offices. I doubt they're as diverse with MVs.
The main issue they'll want from you is proof of vehicle insurance. My insurance agent only needed vehicle gross weight, commercial, or non commercial status. My MV insurance is $188 ever 6 months for non commercial use.
Now in NC if your vehicle weight is 14,000 you have to have a commercial insurance policy by DoT law regardless if it use for business or not. But insurance companies base your rates if its actually used for personal or business...! A little insurance catch 22, but due to the age of most MVs and you're only needing required collision coverage to apply to DoT law your premium should be low unless driving record says otherwise.
Oh I almost forgot weighted tags are $$$ roughly $400 per year. The most important issue is vehicle insurance. Improper weight cost $400 per ticket, weighted tag cost $400 per year, but no insurance cost possible jail time and/or heavy fine, so keep it simple keep insurance current...!
