Sec. 3.02. PROFESSIONAL CONSULTANTS. In addition to the authority of the board to employ the services of certain consultants set forth in this article, the board has the authority to employ the services of any professional consultant recommended by the executive director, including investment advisors and investment managers, whenever the services of the consultants are considered necessary or desirable and in the best interests of the pension system, as determined by the board in consultation with the executive director. A professional consultant shall receive such compensation as may be determined by the board in accordance with Section 4.01 of this article.