ISO 12619-3:2014 specifies tests and requirements for the pressure regulator, a compressed gaseous hydrogen (CGH2) and hydrogen/natural gas blends fuel system component intended for use on the types of motor vehicles defined in ISO 3833.

ISO 12619-3:2014 is applicable to vehicles using CGH2 in accordance with ISO 14687‑1 or ISO 14687‑2 and hydrogen/natural gas blends using natural gas in accordance with ISO 15403‑1 and ISO/TR 15403‑2. It is not applicable to the following:

-liquefied hydrogen (LH2) fuel system components;

-fuel containers;

-stationary gas engines;

-container mounting hardware;

-electronic fuel management;

-refuelling receptacles.