Steve: I looked on my I-code adoption map, and I can't see what building code Vermont has adopted. Your best bet would be to contact your local building offical.
Sorry....wish I could help you out a bit more.
BTW: The NFPA 13 is basically the sprinkler code. It states where the sprinklers heads are to be installed for what type of system (nfpa 13, 13R, 13D, etc...).
