Every year is overkill for rabies vaccine for pets. It lasts 3+ years unless there is a weaker version I don't know about. Are you sure the law requires the vaccine, or just that the rabies vacc be verified and a new tag issued each year?

My vet wouldn't even give a rabies vacc under 2.5 years from the previous one unless the circumstances required it. The exception is for puppies, they get it at 4-6 months, with a booster after 1 year, but it's 3 years from then on. The vaccine actually lasts a little longer than that, but the expiration has so many variables that they revaccinate every 3 years. Much better safe than sorry in this case. This is one vaccine you don't want to take chances with.

I acknowledge that some state/local laws aren't based on reality or common sense though......