This took a bit of dredging... [url]https://forum.atlas-games.com/t/questions-about-verditius-magic-again/4914/6]
Maybe I'm reading it wrong but the conclusion I draw is that it depends on which virtues the Verditius uses to prouduce the effect. If it just affects the lab total anybody can use it, if it affects the magic itself (in some nonstandard mystery way) then the lab text can't be used by just anybody.
Or something.
Rich