(a) If, not later than the 12th month after the date letters of guardianship are granted, the property securing a debt for which a claim is allowed, approved, and fixed under Section 1157.151(a)(2) is not sold or distributed, the guardian of the estate shall:
(1) promptly pay all maturities that have accrued on the debt according to the terms of the maturities; and
(2) perform all the terms of any contract securing the maturities.
(b) If the guardian defaults in payment or performance under Subsection (a):
(1) on the motion of the claim holder, the court shall require the sale of the property subject to the unmatured part of the debt and apply the proceeds of the sale to the liquidation of the maturities; or
(2) at the claim holder's option, a motion may be made in the same manner as a motion under Subdivision (1) to require the sale of the property free of the lien and apply the proceeds to the payment of the whole debt.