A quick search reveals https://www-static.bouldercolorado.gov/docs/Mobile_Food_Vehicle_Application_2017-1-201611231158.pdf https://www-static.bouldercolorado.go

A quick search reveals https://www-static.bouldercolorado.gov/docs/Mobile_Food_Vehicle_Application_2017-1-201611231158.pdf https://www-static.bouldercolorado.gov/docs/Mobile_Food_Vehi... > a restaurant fire suppression system shall be required for all cooking operations that produce grease-laden vapors. These systems can be activated automatically or manually to dispense chemicals to suppress the flames of a fire I.e. it's not "each truck". You can have a food truck that doesn't create that particular fire hazard without an expensive fire suppression system.