N.M. Admin. Code § 10.12.8.15
Employees who tested positive for drugs or alcohol urine tests may elect to have, at their expense, an aliquot, if any exists, of the original urine specimen retested by another laboratory that meets applicable provisions of any state licensure requirements and is certified in forensic urine drug testing by either the substance abuse and mental health services administration or the college of American pathologists. The drug testing laboratory shall arrange for the shipment of the aliquot to the laboratory of the employees' choosing. The department shall pay for the retest if the retest is negative. Any remaining samples after the appropriate times listed here may be destroyed and the final results received will remain as the final record without further right to appeal or challenge the results.
N.M. Admin. Code § 10.12.8.15