Section 120-D. Officers of meeting

In  order  to  facilitate  business
  procedure, the  local  authorities  of  the  several  municipalities  or
  districts  meeting  jointly for the purposes herein provided shall, at a
  meeting at which all the municipalities and districts intending  to  act
  jointly  are represented, choose from among their number a chairman, who
  shall act as such until his successor is chosen  in  a  similar  manner.
  Such meeting, when organized, shall elect a secretary who may or may not
  be a member of one of the local boards meeting jointly.