(a) Separate accounts shall be kept on the books of the institution showing the sources of all sums collected and the purposes for which disbursements are made.
(b) All trust funds, including gifts, grants, and bequests received, establishing or adding to endowment funds, loan and scholarship funds, and funds for other current restricted purposes, shall be credited to separate accounts and shall not be commingled with other local or institutional funds.
(c) If the governing board so elects, deposits of all funds not specifically required to be deposited to special accounts may be deposited in a single bank account if the records of the institution clearly reflect the balances attributable to general funds and various categories of trust funds.
(d) Interest received from depository banks for funds on deposit may be credited to an appropriate account in either general funds or trust funds in relation to the sources of temporary investments in time deposits, if the disposition of the earnings was not specified by the grantor. Interest received from the trust funds time deposits shall be available for loans, scholarships, fellowships, institutional research, faculty aid, and other lawful purposes.