It depends. Some actors will build that in to their contract, and others just have will have a discussion with the director, i.e. Mark Hamill.
Some have too much a say and too much power too, ie Tom Cruise ruining the mummy reboot with his demands (maybe the movie would've flopped anyway, but still one gotta wonder about how some things were written originally).
I think probably none of the actors of this trek would have that kind of power because they aren't big names.
I honestly would never hire certain actors if I were to make a movie. I get big names are hired in attempt to attract more audience, but it doesn't even work that much anymore.
The politics behind a movie, with the influence of executives etc etc, are bad enough that you don't need to get actors who will be too demanding and difficult to work with.