Can't remember where I read it, but I'm sure that there's a general convention (not in the rules as far as I can see, unfortunately, or not as the case may be) of a minimum turn length to prevent players low on clock time from just 'forfeiting all activations' and basically playing out a turn in half a second when they're up on scenario. Something like 15 seconds...
Is there such a convention/rule?
Edit - Follow up... does scenario *need* to be checked before passing turn?
However, they did point out that there are mandatory actions to be taken every turn, like removing focus, frenzy checks, continuous effects, and a few others that I don't recall off the top of my head. You can't pass the turn without resolving those.
Not quite a competitive player, yet, mostly because I don't have time to go to tournaments.