---
kind: "section"
citation: "10 C.F.R. § 26.133"
title: "10"
number: "26.133"
heading: "Cutoff levels for drugs and drug metabolites."
url: "https://uscodex.org/cfr/10/26.133"
---

# §26.133. Cutoff levels for drugs and drug metabolites.


Subject to the provisions of [§ 26.31(d)(3)(iii)](/cfr/10/26.31.md?p=d-3-iii), licensees and other entities may specify more stringent cutoff levels for drugs and drug metabolites than those in Table 1 to § 26.133 and, in such cases, may report initial test results for only the more stringent cutoff levels. Otherwise, the following cutoff levels must be used for initial testing of urine specimens to determine whether they are negative or positive for the indicated drugs and drug metabolites:


## Notes

### Amendments

[87 FR 71459, Nov. 22, 2022]

### Authority

Authority: Atomic Energy Act of 1954, secs. 53, 103, 104, 107, 161, 223, 234, 1701 (42 U.S.C. 2073, 2133, 2134, 2137, 2201, 2273, 2282, 2297f); Energy Reorganization Act of 1974, secs. 201, 202 (42 U.S.C. 5841, 5842); 44 U.S.C. 3504 note.

### Source

Source: 73 FR 17176, Mar. 31, 2008, unless otherwise noted.

### Amendments

[87 FR 71459, Nov. 22, 2022]