Prohibits fuel oil, grade number four in any building or facility in the state

This bill prohibits the use of grade 4 fuel oil (as defined by ASTM D396-15c) in all buildings and facilities across the state after July 1, 2030. It directly affects property owners, businesses, and institutions currently using this fuel type for heating or energy. The law implements a specific date-based ban, with an exception allowing municipalities to adopt stricter regulations. The policy change requires facilities to transition to alternative fuel sources or systems by the 2030 deadline.