16 CFR § 23.9 - Misrepresentation as to content of pewter.

(a) It is unfair or deceptive to mark, describe, or otherwise represent all or part of an industry product as “Pewter” or any abbreviation if such mark or description misrepresents the product's true composition.

(b) An industry product or part thereof may be described or marked as “Pewter” or any abbreviation if it consists of at least 900 parts per 1,000 Grade A Tin, with the remainder composed of metals appropriate for use in pewter.