Section 342. County or part-county health districts; withdrawal of a city

1. The governing authorities of any  city  which  has  consented  to  be
  included  in  a  county or part-county health district, may, at any time
  after three years shall have elapsed since such city has  been  included
  in  such  health  district,  by  resolution adopted by said authorities,
  provide for the withdrawal of such city from the county  or  part-county
  health district.
    2.  Before  such  action for the withdrawal of a city from a county or
  part-county health district is taken an opportunity shall be given for a
  public hearing before such governing authorities. Public notice shall be
  given and the board of  health  of  the  county  or  part-county  health
  district  shall be notified in writing, at least thirty days in advance,
  of the time and place of such hearing.
    3. The withdrawal of a  city  from  a  county  or  part-county  health
  district,  shall  become  effective  at  a  time  to  be  stated  in the
  resolution adopted by the governing authorities of the city pursuant  to
  the  provisions  of this section, which said time shall be not less than
  thirty days from the date of the adoption of said resolution.  Upon  the
  date  when  such  resolution  shall  become  effective, the local health
  district of such city shall be reinstated and  it  shall  have  all  the
  powers  of  a  local  health  district  as though such city had not been
  included in the county or part-county health district  pursuant  to  the
  provisions of this article.