Chartair has put people in 402's with less than 500 hours and Australasian Jet into PA31's with the same.
So when needed it can be done somehow??
Throw in all the other low hour twin pilots on the east coast too.
To quote one of the Chief Pilots 'Flying Bear'
The "insurance" thing is largely a cop out, in my opinion - an easy way to show a pesky wannabe the door...