charly roy,
according to jar ops regulations, crew planning is allowed to plan you for a max 12 hrs duty time (incl. check in/out), which is allowed to be exceeded by max 2 hrs.
only in extraordinary cases (not foreseeable! technical out base, i.e.) this time might be exceeded by another 2 hrs with commanders decision (i did that only once or twice in my career, but preferrably 16 hrs duty than an overnight without clothes at a scary place
).
so, in fact you are allowed to be planned 12 hrs duty prior to your duty start.
i mean thats more than enough, isnīt it?!
rgds410