Code of Federal Regulations Title 21. Food and Drugs § 21.117.420 Using approved suppliers

(1) Written procedures for receiving raw materials and other ingredients must be established and followed;

(2) The written procedures for receiving raw materials and other ingredients must ensure that raw materials and other ingredients are received only from approved suppliers (or, when necessary and appropriate, on a temporary basis from unapproved suppliers whose raw materials or other ingredients are subjected to adequate verification activities before acceptance for use);  and

(3) Use of the written procedures for receiving raw materials and other ingredients must be documented.