Wrong on several counts, DFC.
Firstly, nothing like everyone is operating to JAR's yet. Secondly, even if they were, there are numerous "differences" filed from one state to the next, so there is less of a common denominator than you might expect. Thirdly, it is still up to the individual regulator to ensure compliance from airlines registered in their respective states. So if one regulator is unwilling or unable to apply the regulations correctly or at all, there is a resultant commercial advantage for those airlines, at the expense of safety.