you can see the entire briefing any timed at c-span doirpg. it's underway right now on c-span. >>> the d.c. circuit court of appeals heard an oral argument last week on debit card sweep fees charged to retailers under the dodd-frank law they can place a cap on swipe fees. the fees were set at 44 cents by card networks before the law, and reduced to 21 cents by the federal reserve in 2011. this is an hour. >> thank you, your honor. this case involves the straight forward issue and the fees allowable for interchange are unequivocally foreclosed by section 920 of the electronic fund transfer act. if not whether the board's policy decisions reflect a permissible interpretation of the statute. let me first talk about network exclusivity and routing. debit cards operate over two main meths signature in which you sign the slip or pen based on the atm. signature is based on credit card infrastructure. because of the historical root it's easier for cards to be enabled with different pin numbers but not -- >> we -- [inaudible] we understand the networks