Section 13-341. Prohibition upon trustees and employees

Except as provided
  in this subchapter, the trustees and employees assigned to the board are
  prohibited from having any interest,  directly  or  indirectly,  in  the
  gains  or  profits  of  any  investment  of the pension fund or as such,
  directly or indirectly, from receiving any pay or  emolument  for  their
  services.  The  trustees and such employees, directly or indirectly, for
  themselves or as agents or partners of others, shall not borrow  any  of
  its  funds or deposits or in any manner use the same except to make such
  current and necessary payments as are  authorized  by  such  board;  nor
  shall any such trustee or any such employee become an indorser or surety
  or  become  in any manner an obligor for moneys loaned by or borrowed of
  such pension fund.