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;#
(3)There is no printed collector's name and no collector's signature;#
(4)Two separate collections are performed using one CCF;#
(5)The specimen ID numbers on the specimen bottle and the CCF do not match;#
(6)The specimen bottle seal is broken or shows evidence of tampering (and a split specimen cannot be re-designated, see § 40.83(h)); or#
(7)Because of leakage or other causes, there is an insufficient amount of specimen in the primary specimen bottle for analysis and the specimens cannot be re-designated (see § 40.83(h)).#
(8)For an oral fluid collection, the collector used an expired device at the time of collection.#
(9)For an oral fluid collection, the collector failed to enter the expiration date in Step 4 of the CCF and the laboratory confirmed that the device was expired.#