Section 13-519. Medical board

a. There shall be a medical board of three
  physicians constituted as follows:
    1. One physician  who  shall  be  appointed  by  the  members  of  the
  retirement board who are contributors.
    2.  One  physician  who  shall  be  appointed  by  the  members of the
  retirement board who are not contributors.
    3. One physician who shall be appointed by the retirement board.  Such
  physician  shall  be an expert in women's diseases or in diseases of the
  nervous system.
    b. They shall be appointed to serve for a term of three years but  the
  term  of each shall expire on August first in different years. Vacancies
  shall be filled for the unexpired term. All appointments for a full term
  or for an unexpired term shall be made by the same group of  members  of
  the retirement board which appointed the predecessor.
    c.  All medical examinations required or authorized by sections 13-550
  (relating to retirement of  certain  contributors  for  disability)  and
  13-551  (relating  to  retirement  for  accident disability) of the code
  shall be made by the medical board  or  by  a  physician  or  physicians
  designated  by  the  medical  board under rules and regulations for such
  designation  prescribed  by  the  retirement  board,  at  the  place  of
  residence  of  the  contributor  or  at  a  place  designated  by mutual
  agreement.