We all know you can still be hammered after 8 hours.
What about 'fit for duty'?
I think the intent in Sub 3 is clear, you don't go near an aeroplane inside the 8 hours, but it is so poorly written.
I guess it could be argued that putting on your uniform is preparatory work, or even taking an early look at the forecast.
...preceding departure...needs a simple rewrite to something along the lines of commencing flight related tasks.
But we can guarantee that one line that needs a lil modification to be clear, will be re-written into a harry potter sized novel.