Ideally the key topics for each meeting would have been mapped out in a strategic board calendar at the beginning of each year and approved by the full board.
Then roughly a month before each board meeting the board chair and the CEO should take a stab at creating a draft agenda. The draft agenda should be sent to the full board for comments well in advance of the meeting. Trustees should have a chance to weigh in if they feel something else should be on the agenda.
Ultimately it should be up to the board chair and the CEO to make the final call about what is on the agenda.
Updated