From instructor subbing point of view:

Time Clash at the same time for a different studio (MBO specific ask)- If instructor schedule already at another location at the same time > sub blocked.

Overnight XX-hour break between shifts. In Australia the Fitness Award has work hour rules. E.g if the last class an instructor teaches for the day ends at 6:45pm, the earliest class they can pick up the next day would be in XX hrs from then. Having the option to set what those hours are. If instructor went to pick up sub request, they would be blocked or unable to submit