§ 120-b. Supervision of sewage system. If the public works herein
provided be constructed and operated by the municipalities acting
jointly, the local authorities of the contracting municipalities or
districts having charge of sewage shall jointly supervise the
construction and operation of such sewage system, or they may jointly
engage or employ a competent sanitary engineer for such purpose. They
shall jointly elect or appoint all necessary employees at the disposal
plant and for the care of the trunk line sewer, and severally appoint
such employees as they may be authorized so to do by the respective
governing bodies to work on the system within the bounds of such
municipality.