(a) An association may pay taxes, assessments, insurance premiums, and similar charges for the protection of the association's interest in property that secures a real property loan of the association.
(b) A payment under Subsection (a) is an advance, and the association may:
(1) carry the payment on the association's books as an asset of the association for which the association may charge interest; or
(2) add the payment to the unpaid balance of the loan to which it applies as of the first day of the month in which the payment is made.