(a) A pawnbroker may not contract for, charge, or receive an amount, other than a pawn service charge, as a charge for credit in connection with a pawn transaction.
(b) A pawn service charge may not exceed the charge disclosed in the pawn ticket or other memorandum delivered to the pledgor.

(c) A pawn service charge may not exceed an amount equal to:
(1) 20 percent of the total amount financed for one month if that amount is less than or equal to the amount computed under Subchapter C, Chapter 341, using the reference amount of $30;
(2) 15 percent of the total amount financed for one month if that amount is more than the amount computed for Subdivision (1) but less than or equal to the amount computed under Subchapter C, Chapter 341, using the reference amount of $200;
(3) 2-1/2 percent of the total amount financed for one month if that amount is more than the amount computed for Subdivision (2) but less than or equal to the amount computed under Subchapter C, Chapter 341, using the reference amount of $300; or
(4) 1 percent of the total amount financed for one month if that amount is more than the amount computed for Subdivision (3).
(d) A rate set by Subsection (c) shall be proportionately adjusted for a finance period of less than one month.