(a) A permit holder or trustee, if the permit holder deposits the money with a financial institution as trustee, shall:
(1) adopt a written investment plan consistent with this section and Sections 154.256 and 154.258 that specifies the quality, maturity, and diversification of investments;
(2) at least annually, review the adequacy and implementation of the investment plan;
(3) maintain investment records covering each transaction; and
(4) maintain the investment plan in the principal offices of the permit holder and trustee.
(b) The permit holder shall provide the investment plan to the department with the filing of the permit holder's annual report.