I think it should rather opposite way and (like it is with active artifacts) putting passive artifact should prevent removing it for 24 hours.
That's crazy talk.
So a 2% poor/4% common draft bonus usable once every 24h?
A 4% common money cache bonus ... usable once every 24h?
A 1% poor hospital saving increase ... usable once every 24h?
That would make passives pretty much useless, providing such minimal bonuses so infrequently.
Not sure how this would manifest for 'army camp boost' ... maybe timed for a few mins usable once every 24h? Like a supercharged army camp instead of a constant passive.
Seems like a terrible idea. Do you really think that Passives are OP?