Well, in 1986, I wasn't even in middle school/junior high and in 1992, I wasn't worrying about CDL's- I think my biggest worry was if the cute girl I liked liked me.
I have a Class B, but it was mainly so I can drive a yellow bus. I was trained by the local district just under 10 years ago. (So I don't know squat about log books and such... yes, yes, I'm probably a bad CDL driver for not knowing that- a prime example of drivers who don't know the law. You ever talk to an enforcement guy? Sometimes they can't explain things- only quoting the book.) But I've been driving trucks since I was a kid- farm kid here. Dad and Uncle knew nothing of CDL's- all our stuff was tagged farm. Biggest truck we had (still do) at the time was a C-750 Ford flatbed and we had a gross of 32K.
I still know of people w/ semi trucks driving w/out CDLs for farm stuff. And if I read it right, even if it's farm tagged, anything over 40K GVW, you are REQUIRED to have a CDL. I don't think it's right. But as posted, these laws went into effect long before I ever even had a license to drive. Around here, most farmers didn't have tandem axle trucks straight trucks, just singles. And semi's...well, not many were used from what I recall as a kid. Today.... heck.
I know it's all for "safety". But I still people getting caught in the cracks. I think I've seen stories on other forums (and I think here) of people getting pulled over and ticketed because they are towing a "rented" backhoe with a 3/4 ton to do work at their summer place etc. etc. Safety.... (And now we have the TSA at the airports.... also for safety- whole different subject). And the farmer who owns a semi to haul his stuff, but can't get a CDL due to his "high blood pressure" (or other health issue) and can't afford to hire someone since they only use the truck "infrequently".
LOL. If they wanted to make things truly safer, have 16 year olds go through the same training as CDL drivers. They won't get their license till they are 21 if they can't hack it.
edit-
Heck, I just bought a trailer (has it's own thread) and it was tagged "commercial" by the licensing dept because of it's curb weight! Suppose to weight 4050lbs. I'm gonna have to do some research.