Requisition Modifier Preparation The requisition modifier must be prepared by using document identifier AM series and all prescribed information for a requisition. The following chart lists the information that can be changed from the original requisition by submitting a modifier. Record Position Data Element 7 Media and status code 45-50 Supplementary address 51 Signal code 52-53 Fund code 54-56 Distribution code 57-59 Project code 60-61 Priority 62-64 Required delivery date 65-66 Advice code Requisition Modifier Documents The activity initiating the requisition modifier is responsible for notifying other interested activities of such action. The requisition modifier must be submitted to the last known source holding the requisition. Most of the data elements in the requisition modifier will be the same as in the original requisition or latest status record. The following paragraphs describe the format of a requisition modifier. Use record position 1-3 for entering the document identifier in the AM series. Use record position 4-6 for entering the routing identifier of the activity to receive the request. Use other record positions applicable to the data that can be changed to modify one or more data elements. If an element is not being modified, enter the origional data. Shipment Tracing A requisition can remain outstanding due to non receipt of material even though a shipment status was provided. When material is not received after the normal transit time, you can submit a shipment tracer request. The following paragraphs describes the procedures and references for submitting shipment tracers. The DOD Regulation 4500.32R, MILSTAMP, contains the procedures, formats, and address data for tracing shipments in the Defense Transportation System (DTS). Refer to this reference for surface, Logistics Air (LOGAIR), and QUICKTRANS shipments within the DTS. Requests should be turned over to the local transportation officer for tracing according to MILSTAMP. An alphabetic B in record position 68 of a shipment status identifies air and surface domestic freight shipments with a final destination at a CONUS activity. The Joint Military Travel Management Regulation, describes procedures for tracing shipments in these modes. Refer to chapter 220, section 11, of this regulation concerning this subject. An R, I, or C in record position 68 of a shipment status identifies registered, insured, and certified mail or parcel post shipments. These involve material shipments to CONUS or overseas activities. You may use the format for document identifier AFT when requesting a shipment tracer for the material shipped in these modes. Refer to Appendix B1 of NAVSUP P-437 for the format of AFT documents. The information needed to prepare an AFT document is the same as in the AS or AU series except for the document and routing identifier codes. The AFT document should be submitted no earlier than 10 days and no later than 60 days after the date of shipment in the status document. When a shipment status is received, do not send the follow-up actions by using the document identifiers in the AF and AT series. These actions will result only in receipt of another shipment status document with the same information. Cancellation of Requisitions Under normal circumstances, cancellation requests represent a discontinued need for specific items and quantities. The requisitioner, supplementary addressee, or authorized activity may prepare a cancellation of requisitions. Cancellation requests can be submitted as a single-line transaction or by a message that contains one or more transactions. Submit a cancellation request to the last holding activity; use the format in Appendix B1 of NAVSUP P-437 The single-line item cancellation request will not be submitted when CONUS activities receive a notice advising that shipment from a contractor or a depot has occurred. The cancellation request will not be submitted when an overseas activity receives a shipment status under the following conditions: 4-18