PI routing

Hi, We are an ISP in Turkey and one of our customer wants Provider Independent IP Classes. As far as I know, I can get new Classes from RIPE (not within the classes I have allocated) . But I do not know about the routing part. Do I have to assign our customer an AS number and announce their independent classes by that AS #? Or will it be routed to our AS number? I hope that makes my question clear. I appreciate your help Best regards Okan CIMEN ------------------------------------------------ RT.Net - Rumeli Telekom A.S. Tel : +90-212- 288 78 50 / 206 Fax : +90-212- 274 87 21 ------------------------------------------------