Section 51. County manager form

A  county which shall adopt the county
  manager form of government shall have a county executive  to  be  called
  "county  manager."  The  board  of  supervisors shall appoint the county
  manager to serve during the pleasure of the board of supervisors. At the
  time of his appointment he need not be a resident of the county  or  the
  state,  but during his term of office he shall reside within the county.
  No member of the board of supervisors shall, during the term  for  which
  he  was  elected, be eligible for appointment as county manager. Subject
  to any applicable provisions  of  the  civil  service  law,  the  county
  manager  shall  appoint,  supervise  and  at pleasure remove every other
  administrative officer and employee of the county except  those  elected
  by vote of the people and their subordinates, except that (1) the county
  manager  may,  when  authorized  by  local law, serve without additional
  compensation as the head of one or more departments not administered  by
  an  elective  official and (2) the county manager may delegate to any of
  his subordinates the power to appoint or remove  persons  working  under
  the  supervision  of  such subordinate. The foregoing provisions of this
  section, together with the other applicable provisions of this  chapter,
  including   those   provisions  which  may  be  made  applicable,  shall
  constitute the structure  of  the  county  manager  form  of  government
  authorized to be adopted by this chapter.