The Maui News - Supporters say state Senate's passage of a bill requiring all back-seat passengers in vehicles to buckle up won't cost motorists anything and could help reduce serious injuries and deaths in crashes. Retired Maui Police Capt. Charles Hirata, who has advocated for such a measure for the past few years, said he saw many back-seat passengers ejected and seriously injured or killed in crashes when they weren't wearing seat belts. Senate Bill 4 was approved in a 23-1 vote last Thursday by the state Senate. It would take effect when signed into law by the governor. The bill changes current state law that requires seat belt use only by back-seat passengers under age 18, as well as drivers and front-seat passengers. Laws requiring all occupants to use seat belts are already in effect in many states.