~Everything will use AI at some point. This is like requiring a disclaimer for using Javascript back when it was introduced. It's unfortunate but I think ultimately a losing battle.

Plus if you want to mandate it, hidden markers (stenography) to verify which model generated the text so people can independently verify if articles were written by humans (emitted directly by the model) is probably the only feasible way. But its not like humans are impartial anyway already when writing news so I don't even see the point of that.