See, this one is messed up. Does it have to be about Creative Agenda, and if so, specifically from one to another? Or is it about altering the rules from what is written to what is played? Which is different from altering the system as used to a different system as play progresses.
To be discussed.
Changing from one Creative Agenda to another, or from the lack of shared Creative Agenda to a specific one, during play, typically through changing the System. In observational terms, often marked by openly deciding to ignore or alter the use of a given rule.