1.1. If an LPG heating system in a motor vehicle or trailer can also be used when the vehicle is in motion, the LPG combustion heater and its supply system shall comply with the following requirements: a3c0
1.1. If an LPG heating system in a motor vehicle can also be used when the vehicle is in motion, the LPG combustion heater and its supply system shall comply with the following requirements: a0c0