N.Y. General Business Law § 236: Prima facie proof

§ 236. Prima facie proof. 1. In any action relating to the

enforcement of any provision of this article, a certificate duly issued

by an assay office of the treasury department of the United States,

certifying the weight of any article, or any part thereof, or of the

kind, weight, quality, fineness or quantity of any ingredient thereof,

shall be receivable in evidence as constituting prima facie proof of the

matter or matters so certified.

2. In any action relating to the enforcement of any provision of this

article, proof that an article has been marked in violation of the

provisions of this article shall be deemed to be prima facie proof that

such article was manufactured after this article became effective.