I was responding to an implication in Ron Levy's assertion: that if the NPS can make X a crime, then they can make Y a crime.
With respect to what the NPS has done with regards to the FARs: by way of the congressional authority granted by the FAA, the FARs are already the law of the land. So the NPS's regulation:
"(d) The use of aircraft shall be in accordance with regulations of the Federal Aviation Administration. Such regulations are adopted as a part of these regulations,"
seems to manage to be redundant in part and inapplicable in part, since the FARs often make specific reference to the FAA Administrator.
I'm confused why they would do that since it seems redundant - under what circumstances would FAA or USCG regulations not be applicable to any area the NPS has jurisdiction over? I'm not familiar with USCG regulations, but I don't know of any FAA regulations that say "not applicable in areas covered by the NPS." If such regulatory voids did exist, I could see the value in NPS "adopting" the FAA regulations to cover said voids.
Which seems to me to mean that, operationally, the FAA regulations aren't really "adopted" by the NPS so much as redundantly noted. Perhaps a case of "if we repeat the same law often enough, it'll get obeyed?"