Firstly, may I ask, what is slyguy on about pax not wearing PLB's on the rig flights anymore due to 'legislation'
There was an issue with the PLB's conflicting with the larger, stronger ELT's during the other incident six weeks ago. Basically, the PLB's were masking the ELTs signal... it is explained better
here.
Until a solution could be found I am led to believe there use was suspended. Not sure if it was done through legislation though.