[Code of Federal Regulations] [Title 21, Volume 9] [Revised as of April 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR1305.27] [Page 78] TITLE 21-FOOD AND DRUGS CHAPTER II--DRUG ENFORCEMENT ADMINISTRATION, DEPARTMENT OF JUSTICE PART 1305_ORDERS FOR SCHEDULE I AND II CONTROLLED SUBSTANCES Sec. 1305.27 Preservation of electronic orders. (a) A purchaser must, for each order filled, retain the original signed order and all linked records for that order for two years. The purchaser must also retain all copies of each unaccepted or defective order and each linked statement. (b) A supplier must retain each original order filled and the linked records for two years. (c) If electronic order records are maintained on a central server, the records must be readily retrievable at the registered location. Sec. 1305.28 Canceling and voiding electronic orders. (a) A supplier may void all or part of an electronic order by notifying the purchaser of the voiding. If the entire order is voided, the supplier must make an electronic copy of the order, indicate on the copy ``Void,'' and return it to the purchaser. The supplier is not required to retain a record of orders that are not filled. (b) The purchaser must retain an electronic copy of the voided order. (c) To partially void an order, the supplier must indicate in the linked record that nothing was shipped for each item voided.