(a) A trust company may deposit trust money or other trust assets with itself as an investment if the settlor or the beneficiary authorizes the deposit and if
(1) the trust company maintains as security for the deposits a separate fund of securities that may be used for trust investments and that are under the control of a federal reserve bank or a clearing corporation in this state or elsewhere; in this paragraph, “clearing corporation” has the meaning given in AS 45.08.102;
(2) the total market value of the security fund maintained under (1) of this subsection is at all times at least equal to the deposit;
(3) the security fund maintained under (1) of this subsection is expressly designated as a security fund; and
(4) the security fund maintained under (1) of this subsection is maintained under the control of a person listed in AS 06.26.010(a).
(b) A trust company may make periodic withdrawals from or additions to the security fund required by (a) of this section if the trust company maintains the value required by (a) of this section for the security fund. Income from the securities in the security fund belongs to the trust company.
(c) Notwithstanding (a) of this section, security under (a) of this section for a deposit is not required to the extent the deposit is insured by the Federal Deposit Insurance Corporation or its successor.