Can those of Sa’ami descent also opt out??
Still, some of them might. Possibly the Inari and the Skolt could pull it off by comparing their traditional culture which includes following migratory reindeer to that of the Arabs whose traditional culture includes following migratory goats.
A Sa'ami traditional shaman could probably get off the hook, but the Africanized people to the South have done so much to that tradition the federales would think it was just another Santa Claus schtick.
The ultimate test would be what happens in Europe. There, the last 500 Skolt speakers are subjected to intense medical scrutiny by the national health services of Russia, Finland and Sweden. They can't turn around to pull up their shorts they don't have a NHS type taking samples of their stool.
The results of these studies show up as great scientific works focusing mainly on liver function and dentistry.
There's a group in Florida who identify themselves as one of those Church of the First Born outfits, and they wear Amish style clothing. But they don't fool me ~ but they might trick IRS.