21 CFR 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.
Title 21 published on 2014-04-01.
No entries appear in the Federal Register after this date, for 21 CFR Part 1305.