In the team mandates, and in our discussion, we sometimes mention Power Levels. Here are the definitions:
Power Level 1: May ask that an issue come to plenary (at a minimum, everyone has this power, assuming the request meets the group-defined standards for what's plenary worthy).
Power Level 2: May bring a proposal to plenary. This would generally happen in the context of a team operating within their territory and where the factors that need to be balanced have already been defined by the plenary.
Power Level 3: May post a tentative decision which will become a group agreement if no one objects within a specified amount of time; the proposal need not come to plenary if concerns can be addressed outside.
Power Level 4: May make binding decisions on their own; they only have to announce the decision.