DOT Rule 49 CFR Part 40 Section 40.127
Subpart G - Medical Review Officers and the Verification Process
§ 40.127 What are the MRO's functions in reviewing negative test results?
As the MRO, you must do the following with respect to negative drug test results you receive from a laboratory, prior to verifying the result and releasing it to the DER:
(b) Review the negative laboratory test result and ensure that it is consistent with the information contained on the CCF.
(c) Before you report a negative test result, you must have in your possession the following documents:
(d) If the copy of the documentation provided to you by the collector or laboratory appears unclear, you must request that the collector or laboratory send you a legible copy.
(e) On Copy 2 of the CCF, place a check mark in the “Negative” box (Step 6), provide your name, and sign, initial, or stamp and date the verification statement.
(g) Staff under your direct, personal supervision may perform the administrative functions of this section for you, but only you can cancel a test. If you cancel a laboratory-confirmed negative result, check the “Test Cancelled” box (Step 6) on Copy 2 of the CCF, make appropriate annotation in the “Remarks” line, provide your name, and sign, initial or stamp and date the verification statement.
[65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001]