(a) Except as provided by Subsection (b), this subchapter applies to a fiduciary holding a security in its fiduciary capacity and to a bank, trust company, or private banker holding a security as a fiduciary, custodian, custodian for a fiduciary, or managing agent, regardless of:
(1) the date of the agreement, instrument, or court order by which the fiduciary, custodian, or managing agent is appointed; and
(2) ownership by the fiduciary, custodian, or managing agent of capital stock of the clearing corporation.
(b) This subchapter does not apply to a security held by a fiduciary, bank, trust company, or private banker on behalf of a domestic insurance company, unless the prior express approval of the State Board of Insurance is obtained. The board may grant approval to all domestic insurance companies generally, or to specific insurance companies on a case-by-case basis.
(c) For the purposes of this subchapter, "fiduciary" includes a state or national bank acting in a fiduciary capacity.