(2) Upon the written recommendation and majority vote of the local governing body of a district having five directors, the number of directors for the district may be increased to seven. Notwithstanding any unexpired term of office to which a member may have been elected, all five zone positions shall be placed on the ballot at the next following general election. The department shall determine the terms of office for the positions as provided in ORS 568.560 (5)(d). Any vacancy that occurs in a zone position shall be filled as provided under ORS 568.560. [1969 c.393 §4; 2007 c.690 §6; 2009 c.220 §29]