---
kind: "section"
citation: "21 C.F.R. § 660.26"
title: "21"
number: "660.26"
heading: "Specificity tests and avidity tests."
url: "https://uscodex.org/cfr/21/660.26"
---

# §660.26. Specificity tests and avidity tests.


Specificity and avidity tests shall be performed using test procedures approved by the Director, Center for Biologics Evaluation and Research.


## Notes

### Amendments

[53 FR 12764, Apr. 19, 1988, as amended at 67 FR 9587, Mar. 4, 2002; 70 FR 14985, Mar. 24, 2005]

### Source

Source: 53 FR 12764, Apr. 19, 1988, unless otherwise noted.

### Authority

Authority: 21 U.S.C. 321, 331, 351, 352, 353, 355, 360, 360c, 360d, 360h, 360i, 371, 372; 42 U.S.C. 216, 262, 263, 263a, 264.

### Amendments

[53 FR 12764, Apr. 19, 1988, as amended at 67 FR 9587, Mar. 4, 2002; 70 FR 14985, Mar. 24, 2005]