111.315—What are the requirements for laboratory control processes?
You must establish and follow laboratory control processes that are reviewed and approved by quality control personnel, including the following:
(b)
Use of sampling plans for obtaining representative samples, in accordance with subpart E of this part, of:
(4)
Product that you receive for packaging or labeling as a dietary supplement (and for distribution rather than for return to the supplier); and
(d)
Use of criteria for selecting standard reference materials used in performing tests and examinations; and