Okla. Stat. tit. 14A, § 14A-3-408

(1) If a lender makes a change in the terms of a revolving loan

account without complying with this section any additional cost or

charge to the debtor resulting from the change is an excess charge

and subject to the remedies available to debtors (Section 5-202) and

to the Administrator (Section 6-113).

(2) A lender may change the terms of a revolving loan account

whether or not the change is authorized by prior agreement. Except

as provided in subsection (3) of this section, the lender shall give

to the debtor written notice of any change before the effective date

of the change as follows:

(a) for changes in the rate of interest charged on such an

account, at least one written notice shall be given to

the debtor at least one billing cycle, but not less

than thirty (30) days, prior to such change taking

effect; and

(b) for a change in the terms other than the rate of

interest, at least two written notices shall be given

to the debtor, with the first notice at least two

billing cycles, but not less than sixty (60) days,

prior to such change taking effect.

(3) The notice specified in subsection (2) of this section is

not required if:

Oklahoma Statutes - Title 14A. Consumer Credit Code Page 141

(a) the debtor after receiving notice of the change agrees

in writing to the change;

(b) the debtor elects to pay an amount designated on a

billing statement (subsection (2) of Section 3-309 of

this title) as including a new charge for a benefit

offered to the debtor when the benefit and charge

constitute the change in terms and when the billing

statement also states the amount payable if the new

charge is excluded;

(c) the change involves no significant cost to the debtor;

(d) the debtor has previously consented in writing to the

kind of change made and notice of the change is given

to the debtor at least thirty (30) days prior to the

effective date of the change;

(e) the change applies only to debts incurred after a date

specified in a notice of the change given at least

thirty (30) days prior to the effective date of the

change;

(f) the kind or type of change is of a class defined by

the Administrator by rule, as not requiring the

advance notice set forth in this section for the

protection of the consumer; or

(g) the change involves late payment charges or over-the-

limit charges.

(4) The notice provided for in this section is given to the

debtor when mailed to the debtor at the address used by the lender

for sending periodic billing statements.