(b) The selection and appointment of an investment adviser or consultant for investment services by the board of a retirement system, pension fund, or investment board subject to this Code, except those whose investments are restricted by Section 1-113.2, shall be made and awarded in accordance with this Section. All contracts for investment services shall be awarded by the board using a competitive process that is substantially similar to the process required for the procurement of professional and artistic services under Article 35 of the Illinois Procurement Code. Each board of trustees shall adopt a policy in accordance with this subsection (b) within 60 days after the effective date of this amendatory Act of the 96th General Assembly. The policy shall be posted on its web site and filed with the Illinois Procurement Policy Board. Exceptions to this Section are allowed for (i) sole source procurements, (ii) emergency procurements, (iii) at the discretion of the pension fund, retirement system, or board of investment, contracts that are nonrenewable and one year or less in duration, so long as the contract has a value of less than $20,000, and (iv) in the discretion of the pension fund, retirement system, or investment board, contracts for follow-on funds with the same fund sponsor through closed-end funds. All exceptions granted under this Section must be published on the system's, fund's, or board's web site, shall name the person authorizing the procurement, and shall include a brief explanation of the reason for the exception. A person, other than a trustee or an employee of a retirement system, pension fund, or investment board, may not act as a consultant or investment adviser under this Section unless that person is registered as an investment adviser under the federal Investment Advisers Act of 1940 (15 U.S.C. 80b-1, et seq.) or a bank, as defined in the federal Investment Advisers Act of 1940 (15 U.S.C. 80b-1, et seq.).