19 CFR §115.31

1. (a)Before the issuance of a certificate of approval by design type, the Certifying Authority shall:
   1. (1)Make a physical examination of one or more containers of the production series concerned;
   2. (2)Assure itself as to the adequacy of the manufacturer's system to control quality of materials used, manufacturing methods, and finished containers; and
   3. (3)Require the manufacturer to make available to the Certifying Authority records of material, including affidavits furnished by suppliers.
2. (b)The Certifying Authority shall conduct such examinations, inspections, and tests of the production run containers as it deems necessary.