It's not enforceable, because the people in charge don't have any knowledge of whether I consulted an LLM while writing this comment.

You said it yourself - the enforceable policy is a a different, and much more reasonable policy. If the rule is "ultimately" something else, you can in fact just make that the rule. Or include a parenthetical explanation.

Rules are the ideal place for being pedantic and detailed! That's the whole point of rules - ultimately, the rule is the rule that was actually written down. Not anything else.