Where would you find the safety guidelines that must be reviewed and understood before working on a natural gas vehicle?

Safety guidelines for working on natural gas vehicles can typically be found in the vehicle's service manual, which is provided by the manufacturer. Additionally, organizations such as the National Fire Protection Association (NFPA) and the American National Standards Institute (ANSI) publish relevant safety standards. It's also advisable to consult local regulations and training materials specific to natural gas vehicles to ensure compliance and safety. Always ensure that you have received proper training before handling these vehicles.