My understanding is this is not finalised.
There is a consultation process to go through.
It depends on the cost of the kit.
It depends on research into the LAST portable unit.
It depends on attempts by the PFA and BMAA to get exceptions.
It depends on the health and safety position regarding emissions on non-metal aircraft.
It is also the beginning date, which has a two-year compliance period, taking us to 2010.
I have probably missed out one or two, but you get the idea!
Rod1