who is responsible for leading each topic?

Identify who is responsible for leading each topic. Someone other than the formal meeting leader is often responsible for leading the discussion of a particular agenda item. This person may be providing context for the topic, explaining data, or may have organizational responsibility for that area. Identifying this person next to the agenda item ensures that anyone who is responsible for leading part of the agenda knows it — and prepares for it — before the meeting.

Roger Schwarz

“How to Design an Agenda for an Effective Meeting,” Harvard Business Review. March 19, 2015 as quoted in HBR Guide to Making Every Meeting Matter. Harvard Business Review Press. 2016.