I think @Chinatown has already about covered this. Just want to add something. It is a waste to let a permit expire but it is far from the end of the world. Just go find a carrier that will get you through the whole CDL process then train you. Do the year then come back to where you are now and you can pretty much drive what you want. Don't give yourself an ulcer over what is really a trivial matter.
If the truck/trailer GVWR is not 26001 or greater you'll be class B. If it doesn't have full air brakes (both truck and trailer) you'll get an L restrictriction. If it's an automatic you'll be restricted to automatics. The test is three parts- pretrip inspection, backing, and a road test. The pretrip is the hardest and I suggest you get a current manual and study hard before you attempt it. Hope that helps!
There are people busted here in Arkansas for failing to have a CDL when in a pickup and trailer big enough and heavy enough for weight. The courts are busy in my area busting them down. If you have a full big truck and a full CDL A with the air brakes etc you have nothing to worry about as far as anything else you might choose to drive someday whenever. There are perks to having a nice CDL A. There has been a few times I loaded down my pickup truck and trailer enough to cause the law to take a look see. When they saw my CDL A and all that, they go thank you for your time sir, you are free to go. I will take a cheap shot at two employers back home in Maryland who believe you have to be a class B to be driving class B trucks when their yards are FULL of class A lowboys in the rain. I literally cannot stand the snooty yankees showing that kind of stuffy discrimination. Down here in teh south they hire me on that A and provided its not a painted yellow bus hauling kids they let me drive whatever they had for the job that day.