An association or a federal association, to the extent that its charter and applicable federal regulations permit, may:
(1) exercise any power necessary to qualify as a trustee or custodian for:
(A) a retirement plan meeting the requirements of 26 U.S.C. § 401(d) or 408; or
(B) a similar plan permitted or recognized by federal law; and
(2) invest money the association holds as trustee or custodian under Subdivision (1) in the association’s savings accounts if the plan does not prohibit that investment.