A meeting of the association must be held at least once each year. Special meetings of the association may be called by (i) the president, (ii) a majority of the executive board, or (iii) 20 percent, or any lower percentage if so specified in the bylaws, of the proprietary lessees. No less than 10 or more than 60 days in advance of any meeting, the secretary or other officer specified in the bylaws 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 proprietary lessee. The notice of any meeting shall 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 changes, and any proposal to remove a director or officer.