A method of settling trades includes the steps of obtaining an authenticated delivery instrument, wherein the authenticated delivery instrument is authenticated by a first exchange and may be used to settle a trade undertaken on the first exchange. The sealed geometric shape has a first light permitting surface and a second flexible surface. The film comprises polyester and at least one hydrolysis stabilizer and is distinguished by its low hydrolysis rate. In response to the message, the AT monitors a downlink channel for receipt of the call announcement message.