41 C.F.R. § 128-50.101

Each bureau shall be responsible for establishing and maintaining inventory records of its seized personal property to ensure that:

(a) The date the property was seized is recorded;

(b) All of the property associated with a case is recorded together under the case name and number;

(c) The location of storage of the property is recorded;

(d) A well documented chain of custody is kept; and

(e) All information in the inventory records is accurate and current.