will send a BK5 follow-up inquiry to the transshipper instead of BK1 to the requisitioner. The ICP submits a BK1 follow-up guidelines: ADVICE CODE 5G, 5V, 56 5R, 5Y, 5S, 52 inquiry under the following time NUMBER OF DAYS FROM REQ- UISITION DATE FOLLOW-UP SENT 45 days for “N” Service code requisitions to ASO. 60 days for “R” or “V” Service code requisitions to ASO. 90 days for all requisitions to SPCC. NUMBER OF DAYS FROM JULIAN DATE OF RFI ISSUE 45 days for   “N” Service code requisitions to ASO. 60 days for “R or “V” Service code requisitions to ASO. 90 days for all requisitions to SPCC. Upon receipt of BK1 follow-up inquiry, the person maintaining the carcass tracking record should conduct the research. When conducting the research, check the requisition and the status of the turn-in. The person maintaining the carcass tracking record must submit a BK2 response for each BK1 follow-up inquiry. Refer to chapter 5 of NAVSUP P-485 or appendix P of NAVSUP P-545 for the BK2 format. ASO must receive the BK2 response within 21 days of the follow-up date on the BK1 document (rp 50-54) to avoid additional billing. SPCC should receive BK2 responses within 50 days to avoid additional billings. The BK2 document must contain the applicable response code in record position (rp) 47.NAVSUP P-485 and NAVSUP P-545 contain a complete list of response codes. The following texts list some examples of response codes. Response code A means the shipment document number used for the carcass is the same as the original requisition number. Response code B means the document number used for shipping the carcass is different from the requisition number. The turn-in document number is in rp 48-61. Response code C means there will be no carcass turn-in. The Advice code of the requisition should be 5A. Response code D means there will be no carcass turn-in. The Advice code of the requisition should be 5D. The Carcass Tracking System also permits activities to send an Advance BK2 document. Activities can send an Advance BK2 to the ICP to negate processing of a BK1. Activities should send an Advance BK2 for the following situations: l System cancellations—The supply system canceled the requisition, and the requisitioner turned in the carcass on the original document number. Upon submitting the reorder document, also submit an Advance BK2 with Response code B (rp 47) and the original document number in rp 48-61. . Loss In Shipment-Submit an Advance BK2 with Response code J for nonreceipt of requisitioned AVDLR. In this situation, the supply source shipped the AVDLR, but the requisitioner did not receive it. Also, the requisitioner already shipped the carcass turn-in on the original document number. Use Response code J if the carcass was turned in on the reorder document number. In rp 27-40 of the Advance BK2, put the document number that did not have a turn-in and put Response code J in rp 47. In rp 48-61, put the document number that has a turn-in. In this case, the reorder document will always beat net price because there is an exchange turn-in. The activity that did not receive the material should submit the Report Of Discrepancy (SF 364). The activity should also prepare and submit a DD Form 200 for the lost material If the ICP considers the BK2 response as invalid, the ICP will send a BKR document with a Rejection code to the requisitioner. Record position 65 of the BKR document will contain the Rejection reason code. Chapter 5 of NAVSUP P-485 or appendix U of NAVSUP P-545 provides a list of Rejection codes. Upon receipt of the BKR with Rejection code, the requisitioner should conduct a research and submit the correct BK2 to the ICP. The BKR document received on a transaction does not alter the time frame in generating the BK3 from the ICP. When the ICP has not received a BK2 response within the allotted time frame, the ICP will process a BK3 document. The BK3 document is an advance notification of billing to the requisitioning activity. The amount of the bill is the difference between the net and standard price. NAVSUP P-485 and NAVSUP P-545 describe the format for the BK3 document. The BK3 document sent by the ICP will contain a Reason code 10-7