Mine is registered in Unincorporated Arapahoe County at a buddies house, mailing address is my office since most rural address don't have a direct mailbox; which means it's emissions exempt.
But, you could call them, they are very informative.
Also, you can try to get info here:
https://www.facebook.com/groups/19196817729/
https://www.facebook.com/groups/255611327941404/
https://www.facebook.com/groups/439543802766206/