>like, is he allowed to just put in any old toilet, or is there a gpf restriction?

And if the LLM gets that wrong? It's his job to know the codes or how to go to a reliable resource to find out the correct codes.

Hopefully he would be using the LLM as an enhanced search engine that can point him to relevant authoritative sources that he can use to fact-check its output. I have done that in the past to some effect.

Maybe he just needs a reminder and he’ll have an oh yeah moment when he reads the output maybe he’ll ask it for primary sources. There’s a lot of bad faith going around.