Notwithstanding any other provisions of this subchapter, any discount offered under section
1666f
(b) of this title shall not be considered a finance charge or other charge for credit under the usury laws of any State or under the laws of any State relating to disclosure of information in connection with credit transactions, or relating to the types, amounts or rates of charges, or to any element or elements of charges permissible under such laws in connection with the extension or use of credit.