I read the Safe Propane Installation link, and while I agree that many of the older systems installed in Taiwan built boats among others could be "more safe", it is a bit extreme to call them all dangerous. Safety is a relative thing. The U.S. Coast Guard and Transport Canada base their safety rulemaking on the safety record of systems in the field, not on the latest and greatest ABYC criteria. Rulemaking must pass a cost/benefit analysis and a public comment process. If there was a serious, documented safety issue with these older installations, there would be rulemaking to force updates. There is not. Transport Canada is not sitting on their "hands" on this, they are doing what makes sense....nothing. Thank goodness that SAMS/NAMS is not in charge of rulemaking...there wouldn't be a pleasure boat industry.
Unfortunately, many SAMS/NAMS inspectors seem to believe that virtually every system in a 30-40 year old boat should be updated to the latest ABYC standard. As a result, insurance surveyors are driving up the cost of insurance and boat ownership through this wrong headed sort of thinking. I refuse to hire a SAMS/NAMS surveyor for this very reason.