The safe use of gas fuel installations in vehicles is guaranteed by legal and technical aspects. These topics are included in this study. The regulations ensuring safety in the operation of the mentioned fuel systems serve as a solution for potentially hazardous situations. The components of propane-butane and CNG fueling systems are designed, manufactured and tested to maximize their safety of use. The regulations [6, 7, 8] define the guidelines for the arrangement and assembly method of the system components, and additionally, the assembly service itself may be performed only by an authorized workshop with granted permissions. Installations using gaseous fuels are safer than conventional fuels in the event of a collision or fire, as long as the user of the installation does not gross negligence in operation and maintenance. The article also discusses the context of the restriction in access to the car infrastructure for cars powered by gaseous fuels.