Notwithstanding any other provisions of law, a bank may contract for and collect the following credit service charges in connection with the extensions of credit made pursuant to § 51A-12-12, in an amount agreed to by the bank and the debtor either initially or pursuant to a change in terms authorized in § 54-11-12:
All of the fees and charges permitted by this section shall be deemed interest. No fee, expense or other charge whatsoever may be taken or received by a bank under a revolving loan or charge account arrangement except as provided in this section.
SDCL 51A-12-13