I think it's not what you can read about what a CV can and can't do, it's about reading all the rules applying to a CMV, which a van is not, (if it's under 10K GVWR, and it's not carrying hazmat of a quantity requiring placarding). Suddenly all the CMV rules become applicable when carrying placarded haz, except for the ones only applying to over-26K-GVWR vehicles.
It's interesting that a so-obviously-incompetent officer would be repeatedly bringing attention to his own incompetence. How could someone be doing a job for 25 years and not know his stuff? Wow, that's something to brag about!
We were asked one time by a DOT in ON for our CVOR (our ON/Canadian operating authority), produced the copy, and were told we must carry the original at all times. Said he would let it go 'this once', but next time we'll be fined. At the time, we were leased on with a carrier, informed the carrier of what happened, and were told, um no, we have x number of trucks and you can't all have the original, dohh.
Later we got our own authorities, and very clearly on the paperwork, it stated that the original is to be kept in the office and each truck is to carry a copy. I called the DOT number listed on the paperwork, asking why then, would we have been asked for the original, threatened with fines, and told we must carry the original. Well, no idea, since all the officers have been highly trained, and know all the rules. Ok, even though that's so reassuring, what do we do next time this happens. He said to go into the booth, ask them to call this toll-free number, and they will set them straight.
As a sidenote, in my journey through life, I have found that the people who feel compelled to bring loud and obnoxious attention to their 20/25/30 years in an industry/job, intimating that they are therefore experts, tend to be the most incompetent of all. Big red waving flapping flags to stay away from whenever possible. There is no learning happening there, no admission of even the possibility of error, no flexibility to see or try something a different way, no listening, only loud talking.
Congrats on getting through that experience relatively unscathed Dreamer!