[Code of Federal Regulations]
[Title 49, Volume 1]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR40.89]

[Page 652]
 
                        TITLE 49--TRANSPORTATION
 
          Subtitle A--Office of the Secretary of Transportation
 
PART 40_PROCEDURES FOR TRANSPORTATION WORKPLACE DRUG AND ALCOHOL TESTING 
PROGRAMS--Table of Contents
 
                   Subpart F_Drug Testing Laboratories
 
Sec.  40.89  What is validity testing, and are laboratories required to 
conduct it?

    (a) Specimen validity testing is the evaluation of the specimen to 
determine if it is consistent with normal human urine. The purpose of 
validity testing is to determine whether certain adulterants or foreign 
substances were added to the urine, if the urine was diluted, or if the 
specimen was substituted.
    (b) As a laboratory, you are authorized to conduct validity testing.

[65 FR 79526, Dec. 19, 2000, as amended at 66 FR 41951, Aug. 9, 2001]