(a) To enable the association to pay charges as they become due, an association may require a borrower to pay monthly in advance, in addition to interest or interest and principal, an amount equal to one-twelfth of the estimated annual taxes, assessments, insurance premiums, and other charges on the real property securing a loan.
(b) An association may increase or decrease the amount of the loan payment as necessary to meet the charges.
(c) An association may:
(1) carry payments in trust in an account; or
(2) credit the payments to the indebtedness and advance the money for charges as the charges become due.