Sure. I don't know the specific issues; I can't identify any one specific issue. But there are requirements for crash testing here in Canada that are different from what are in the United States, as an example that I understand. For example, Honda Motor Company in the United States manufactures a car—running on natural gas—that for the past seven years has been rated the cleanest car in North America by a very well recognized standards organization.
On May 15th, 2012. See this statement in context.