No trustee or employee of the board shall have any interest in the gains or profits of any investment made by the board, or as such receive any pay or emolument for his or her services. No trustee or employee of the board shall, directly or indirectly, for himself or herself or as an agent, in any manner use such gains or profits except to make current and necessary payments authorized by the board. No trustee or employee of the board shall become an endorser or surety or in any manner an obligor for moneys loaned or borrowed from the board.
     Any person violating any of the provisions of this section is guilty of a petty offense.