49 CFR § 40.199 - What problems always cause a drug test to be cancelled?
(a) As the MRO, when the laboratory discovers a “fatal flaw” during its processing of incoming specimens (see § 40.83), the laboratory will report to you that the specimen has been “Rejected for Testing” (with the reason stated). You must always cancel such a test.
(b) The following are “fatal flaws”:
(1) There is no CCF;
(2) In cases where a specimen has been collected, there is no specimen submitted with the CCF;
(4) Two separate collections are performed using one CCF;
(5) The specimen ID numbers on the specimen bottle and the CCF do not match;
(c) You must report the result as provided in § 40.161.