Section 382. Optional retirement of members in the division of state police after twenty years of service

a. Any member in the division  of  state
  police in the executive department shall be entitled to retire after the
  completion of twenty years of total creditable service in such division,
  or  upon  attainment  of age sixty in such division if prior thereto, by
  filing an application therefor in a manner similar to that  provided  in
  section  three  hundred  seventy  of this article. Upon so retiring such
  member shall receive:
    1. If he elected or was required to contribute in accordance with  the
  provisions  of section three hundred eighty-one or section three hundred
  eighty-one-a of this  article,  a  retirement  allowance  equal  to  the
  present  value  of  a  retirement allowance computed upon such period of
  service in accordance with the provisions of such sections, or
    2. If he did not elect or was not required to contribute in accordance
  with the provisions of section three hundred eighty-one or section three
  hundred eighty-one-a of this article, a retirement  allowance  equal  to
  the present value of a retirement allowance computed upon such period of
  service  in  accordance  with  the  provisions  of section three hundred
  seventy-five of this article.
    b. The provisions of this section shall be controlling notwithstanding
  any provision in this article to the contrary.