The bylaws must require that meetings of the association be held at least once each year and provide for special meetings. The bylaws must specify which of the association's officers, not less than ten nor more than 60 days in advance of any meeting, shall cause notice to be hand delivered or sent prepaid by United States mail to the mailing address of each unit or to any other mailing address designated in writing by the unit owner. The notice of any meeting must state the time and place of the meeting and the items on the agenda, including the general nature of any proposed amendment to the declaration or bylaws, any budget or assessment changes and, where the declaration or bylaws require approval of unit owners, any proposal to remove an executive board member or officer.