Sec. 4.071. BOARD APPROVAL OF CERTAIN ALTERNATIVE INVESTMENTS. (a) The executive director, an investment manager, a provider of professional investment management services or professional advisory services, or any other person delegated authority to invest or reinvest pension system assets under this article may not invest pension system assets in a single alternative investment unless the board votes to approve the investment by at least a two-thirds vote of all the trustees.

(b) The board may adopt rules necessary to implement this section.