Question about age restrictions in US figure skating levels

So I know in the us levels you can’t compete in certain levels like juvenile, novice, intermediate, and junior if your above a certain age, while senior has no age limit. Hypothetically, if someone were to return to the sport in their mid 20’s (after being in the open juvenile level when they were younger) would they still be able to take the intermediate novice junior and senior tests so that they are able to move up and only compete in senior? Or if you are above a certain age are you not even aloud to take the tests?