I hope this will have a simple resolution.

Here are some criteria for edge cases that could come up:

• It doesn't matter if this is a temporary or permanent assignment.

• If there is a transition on July 1, I'll resolve to the leadership at the end of the day.

• I hope to resolve to a single name, but if there are co-leaders or a similar situation, I may resolve to a %.

• "No one" is mostly to cover extreme cases, like the entire team is dissolved. I'll also use this if it's truly unknown after some honest investigation. Even if there is no formal leader, I will try to resolve to whoever is leading the team in practical terms, even if that's a relatively low-level staff member who's taken over operations temporarily.