Checks (Rules) (GM Core)

Some downtime activities require rolls, typically skill checks. Because these rolls represent the culmination of a series of tasks over a long period, players can't use most abilities or spells that manipulate die rolls, such as activating a magic item to gain a bonus or casting a fortune spell to roll twice. Constant benefits still apply, though, so someone might invest a magic item that gives them a bonus without requiring activation. You might make specific exceptions to this rule. If something could apply constantly, or so often that it might as well be constant, it's more likely to be used for downtime checks; for instance, Assurance could apply.