I'm not real concerned with compliance because, as several have commented, pretty much any of these approaches would meet the requirements. I more want to do a neat job that is going to hold up, not make a giant mess, and most important, not be something that fails and has to be re-done.
Someone mentioned the engraved plaques. That's what I had on my last boat, and I attached it to the hull with 5200. I'm just going to do the same thing again, mostly because even I can't screw it up. When it comes to epoxy, fiberglass mat, and projects like that, I'm the guy who ends up with epoxy and mat all over me and everything else in the boat, and a registration number that is crooked and falling off.