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 compensate for power loss ; in which case, such a ban is possible only from the dates laid down in Article 2 (3).

For the purposes of this Directive : "compressor" means any motor-driven device for circulating and compressing air other than the following two categories of device: - fans, i.e. devices producing air circulation at a positive pressure of not more than 1,1,

Bear in mind that any time you develop a compressed natural gas engine based on gasoline engines, which is the economical way to go, in the short term, at least, you have to change the compression ratio and you will not develop the power from that engine that you do from a gasoline version.

Cities such as Regina and Winnipeg are reported as having very high rates of motor vehicle theft, while centres such as Toronto and Quebec City have comparatively lower rates.