Pretty much every elected legislature ever uses this excuse and gets away with it again and again and again at each election cycle. They will fight tooth and nail to prevent a precedent to the tune of "it's your job to know" even if the precedent is against the executive because even that is too close for comfort.
"Sec. 4. General Provisions. (a) Nothing in this order shall be construed to impair or otherwise affect:
(i) the authority granted by law to an executive department or agency, or the head thereof; or" [2]
Or all the generic legal documents that say "void where prohibited by law" and etc. In general, writing a document that complies with the law seems to be not a requirement.
[1]: https://en.m.wikipedia.org/wiki/List_of_executive_orders_in_...
[2]: https://web.archive.org/web/20250121003847/https://www.white...