As a laboratory, if you conduct validity testing under § 40.92, you must conduct it in accordance with the requirements of this section.

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(a) You may test for a biomarker such as albumin or immunoglobulin G (IgG) or a test for a specific adulterant.

(b) You must follow the applicable HHS requirements for any additional validity testing.

[88 FR 27643, May 2, 2023]