(a) A state bank may not acquire a lien by pledge or otherwise on its own shares, or otherwise purchase or acquire title to its own shares, except:
(1) as necessary to avoid or minimize a loss on a loan or investment previously made in good faith; or
(2) as provided by Subsection (b).
(b) With the prior written approval of the banking commissioner or as permitted by rules adopted under this subtitle, a state bank may acquire title to its own shares and hold those shares as treasury stock. Treasury stock acquired under this subsection is not considered an equity investment.

(c) If a state bank acquires a lien on or title to its own shares under this section, the lien may not by its original terms extend for more than two years. Except with the prior written approval of the banking commissioner, the bank may not hold title to its own shares for more than one year.
(d) A state bank may make loans on the collateral security of securities issued by an affiliate, if the loan is subject to and in compliance with the provisions of Sections 23A and 23B, Federal Reserve Act (12 U.S.C. Sections 371c and 371c-1), as amended, applicable to nonmember insured state banks by virtue of Section 18(j)(1), Federal Deposit Insurance Act (12 U.S.C. § 1828(j)(1)), as amended.