(1) Not more than 180 days after the end of a public corporation's first fiscal year that ends after the effective date of the amendatory act that repealed section 2, a governing body, in consultation with the investment officer, shall adopt an investment policy that, at a minimum, includes all of the following:

    (a) A statement of the purpose, scope, and objectives of the policy, including safety, diversification, liquidity, and return on investment.

    (b) A delegation of authority to make investments.

    (c) A list of authorized investment instruments. If the policy authorizes an investment in mutual funds, it shall indicate whether the authorization is limited to securities whose intention is to maintain a net asset value of $1.00 per share or also includes securities whose net asset value per share may fluctuate on a periodic basis.

    (d) A statement concerning safekeeping, custody, and prudence.

    (2) A governing body that as of the effective date of the amendatory act that repealed section 2 has adopted an investment policy that substantially complies with the minimum requirements under subsection (1) is not in violation of this section as long as that policy remains in effect.