M.E.L.s
In the now locked threads about Tech Logs etc, there are many comments about M.E.Ls.
I always understood that ANY Captain at ANY Airline could elect not to go with a certain M.E.L. applied, however he would need to have a VERY good reason.
I have never yet seen one actually refuse to go.
However I have seen many instances where, with a bit of consultation between the Captain and the LAME, things can be worked out, even if there is no M.E.L.
These M.E.L.s are not just issued on a whim, I have even seen CASA cancel some quite valid ones just because one word is spelt incorrectly.