In addition to rests and dawn/day/dusk, this would be for items that recover uses when
an actor rolls initiative (a lot of items have notes such as "you regain x uses when you roll initiative if you have no uses left"). I was sure there was an issue for this already but "initiative" didn't turn up anything.
items or activities that can be used once per encounter (e.g. "Villain Actions" in Flee, Mortals / Where Evil Lives).
In addition to rests and dawn/day/dusk, this would be for items that recover uses when