|(a) Vehicle fueling connections shall provide for the reliable and secure connection of the fuel system containers to a source of LNG. (b) Fueling connections shall be designed for the pressure expected under normal conditions and corrosive conditions which might occur. (c) Fueling connections shall prevent escape of gas when the connector is not properly engaged or becomes separated. (d) Refueling receptacles on engine fuel systems shall be firmly supported and shall: (1) receive the fueling connector and accommodate the maximum allowable working pressure of the vehicle fuel system; (2) incorporate a means to prevent the entry of dust, water, and other foreign material. If the means used is capable of sealing system pressure, it shall be capable of being depressurized before removal; and (3) have a different fueling connection for each pressure base vehicle fuel system.