SECTION 3.12  EXISTING DEPARTMENTAL BOARDS AND COMMISSIONS.
   (a)   Each departmental board or commission which exists on the effective date of this charter shall remain in existence unless changes are made in accordance with Section 3.01 above or by this charter. The following is a list of departmental boards, commissions, and authorities in the city at the adoption of this charter:
   Airport Authority.  The Airport Authority shall continue to have seven members. Two members of the Airport Authority shall continue to be residents of the Town of Londonderry as directed by the Intermunicipal Agreement. At least two members of the authority shall hold airmen's certificates or higher or the military equivalent.
   Fire Commission.  The Fire Commission shall continue to have five members.
   Board of Health.  The Board of Health shall continue to have five members. The Board of Health shall have at least one physician, one dentist and one nurse among its membership.
   Highway Commission.  The Highway Commission shall continue to have five members.
   Parks, Recreation and Cemetery Commission.  The Parks, Recreation and Cemetery Commission shall continue to have five members.
   Police Commission.  The Police Commission shall continue to have five members.
   Water Commission.  The Water Commission shall continue to have seven members. The mayor shall be an ex-officio member of the Water Commission with a vote.
   (b)   One member of each departmental commission shall be a representative from organized labor, who shall hold a valid union membership at the time of nomination and during his term of office. The mayor shall invite organized labor to submit names for consideration for appointment to these commissions.