Section 321. Local health officer; power of commissioner to appoint; expenses

1. If any local board of health fails  to  appoint  a  health
  officer qualified as provided in the sanitary code, the commissioner may
  exercise  the  powers  of  a  health  officer  in  such municipality, or
  designate a health officer qualified as provided in the  sanitary  code,
  to exercise such powers.
    2.  The  expenses  lawfully  incurred  by  the  commissioner  in  such
  municipality shall be a charge upon and paid by such municipality  until
  such  time  as  a  local  health  officer  shall  be  appointed therein,
  whereupon the jurisdiction conferred by this section on the commissioner
  or other person designated by him shall cease.