(a) Each participating institution shall secure its deposits of public funds with eligible securities the total value of which equals at least 102 percent of the amount of the deposits of public funds covered by a security agreement described by § 2257.103 and deposited with the participating institution, reduced to the extent that the United States or an instrumentality of the United States insures the deposits. For purposes of determining whether collateral is sufficient to secure a deposit of public funds, § 2257.022(b) does not apply to a deposit of public funds held by the participating institution and collateralized under this subchapter.
(b) A participating institution shall provide for the collateral securities to be held by a custodian trustee, on behalf of the participating institution, in trust for the benefit of the pooled collateral program. A custodian trustee must qualify as a custodian under § 2257.041.

(c) The comptroller by rule shall regulate a custodian trustee under the pooled collateral program in the manner provided by Subchapter C to the extent practicable. The rules must ensure that a custodian trustee depository does not own, is not owned by, and is independent of the financial institution or institutions for which it holds the securities in trust, except that the rules must allow the following to be a custodian trustee:
(1) a federal reserve bank;
(2) a banker’s bank, as defined by § 34.105, Finance Code; and
(3) a federal home loan bank.