38 (1) All shut-off valves, throttling valves, gauges, fittings and accessory equipment shall be of a type suitable for liquefied petroleum gas service, and designed for not less than the maximum working pressure to which they will be subjected, except that the rated working pressure of valves, fittings, etc., subject to container pressure shall not be less than 250 psig.

The shut-off valves shall consist, preferably, of one automatic non-return valve and a second valve of the outside screw and yoke type, or two valves of the outside screw and yoke type.

Fuel stopcock (if required) not operating correctly.

4.3.1. Non-emission-related scheduled maintenance which is reasonable and technically necessary (e.g. oil change, oil filter change, fuel filter change, air filter change, cooling system maintenance, idle speed adjustment, governor, engine bolt torque, valve lash, injector lash, timing, adjustment of the tension of any drive-belt, etc) may be performed on engines or vehicles selected for the service accumulation schedule at the least frequent intervals recommended by the manufacturer to the owner (e.g. not at the intervals recommended for severe service).

d. One or more other components (including exhaust ports, turbochargers, valve guides, valve assemblies or insulated fuel injectors);

2. From 1 October 1990, Member States may prohibit the entry into service of vehicles fitted with a positive ignition engine whose fuel requirements do not meet the provisions of the Annexes to Directive 70/220/EEC, as amended by this Directive, except where the manufacturer provides a certificate accepted by the technical service which issued the initial emission type-approval stating that adapting such vehicles to the new fuel requirement entails major engineering changes, namely a change in material specification of the inlet or exhaust valve seats or a reduction in the compression ratio, or an increase in the engine capacity to compe ...[+++]nsate for power loss ; in which case, such a ban is possible only from the dates laid down in Article 2 (3).