(a) A savings bank must:
(1) qualify under and continue to meet the qualified thrift lender test of Section 10(m), Home Owners’ Loan Act (12 U.S.C. § 1467a(m)); or
(2) maintain more than 50 percent of its portfolio assets in qualified thrift assets on a monthly average basis in at least nine out of 12 months.
(b) For purposes of Subsection (a)(2), “qualified thrift assets” means:
(1) qualified thrift investments as defined by 12 U.S.C. § 1467a(m)(4)(C); and
(2) other assets determined by the commissioner, under rules adopted by the finance commission, to be substantially equivalent to qualified thrift investments described by Subdivision (1) or which further residential lending or community development.

(c) The commissioner may grant temporary or limited exceptions to the requirements of this section as the commissioner considers necessary.