21 CFR 660.44 - Specificity.

§ 660.44 Specificity.
Each filling of the product shall be specific for Hepatitis B Surface Antigen as determined by specificity tests found acceptable to the Director, Center for Biologics Evaluation and Research.
[44 FR 36382, June 22, 1979, as amended at 49 FR 23834, June 8, 1984; 55 FR 11013, Mar. 26, 1990]

Title 21 published on 2014-04-01

no entries appear in the Federal Register after this date.