StacksVerified U.S. regulatory reference

49 CFR §40.93

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
As a laboratory, if you conduct validity testing under § 40.92, you must conduct it in accordance with the requirements of this section.
  1. (a)You may test for a biomarker such as albumin or immunoglobulin G (IgG) or a test for a specific adulterant.
  2. (b)You must follow the applicable HHS requirements for any additional validity testing.