Creampuff,
The issue as I see it is that they are not talking about flight time BUT flight DECK duty time.
Therein lies the rub - one carrier has defined Flight DECK duty time as Flight time (ie off blocks to on blocks)
The exemption has no daily limit if I recall correctly for FLIGHT TIME but does for flightdeck duty time.
Flight deck duty time is nebulious because there was no definition of what it meant in the list of definitions in the exemption