As used in this chapter the following words and phrases shall have the following meanings unless the context clearly requires otherwise:(1) "Administrative authority" means the building department of each county, city, or town of this state;(2) "Substantially remodeled or substantially rehabilitated" means any alteration or restoration of a building or structure within any twelve-month period, the cost of which exceeds sixty percent of the value of the particular building or structure;(3) "Council" means the state building code council.[ 1995 c 343 s 5; 1975 1st ex.s. c 110 s 4.]