Much as the LPGA would love the "lock-in" this will achieve for its' members I can't see it working.
It all hinges on the insurance business going lock stock over to using its' database.
Why would they do this? What real risks does the average DIY install cause to an insurer? Let's consider the worst possible install you could imagine (from some of the less scrupulous LPGA approved installers, for example [smiley=evil.gif]). The worst thing that's going to happen is poor running and / or a gas leak.
Granted a large gas leak into the interior of a car will not be nice, and could be dangerous. Otherwise, 99.9% of the time there'll be a nasty smell and not much else.
Bad LPG installs are simply not the bombs the LPGA make out they are so I'm sure the insurance industry will consider the LPGA's proposal, look at the stats to see what percentage of claims are down to LPG issues, and conclude that it's not worth turning away every LPG converted car that doesn't have an entry in the database, especially if there are problems with the LPGA's own approved conversions not automatically ending up on the database!
Even if some insurers do toe the LPGA line, it will open up a niche for those who don't.
Even if it does achieve blanket cover of the whole insurance industry it's not the end of the world. Bend over, pay the money and get your car inspected, jumping through whatever hoops are put before you.
Kevin