(a) The governing body of a public retirement system may appoint investment managers for the system by contracting for professional investment management services with one or more organizations, which may include a bank if it has a trust department, that are in the business of managing investments.
(b) To be eligible for appointment under this section, an investment manager must be:
(1) registered under the Investment Advisors Act of 1940 (15 U.S.C. § 80b-1 et seq.);
(2) a bank as defined by that Act; or
(3) an insurance company qualified to perform investment services under the laws of more than one state.

(c) In a contract made under this section, the governing body shall specify any policies, requirements, or restrictions, including criteria for determining the quality of investments and for the use of standard rating services, that the governing body adopts for investments of the system.
(d) A political subdivision of which members of the public retirement system are officers or employees may pay all or part of the cost of professional investment management services under a contract under this section. Any cost not paid directly by a political subdivision is payable from funds of the public retirement system.