Section 50.25-5 - Products requiring manufacturer or mill certification(a) Products required to be certified by a manufacturer or by mill certificate must be fabricated and tested in accordance with the applicable specifications. Such products will not normally be subject to mill inspection by the Coast Guard except as required by § 50.25-7 .(b) The Officer in Charge, Marine Inspection, having cognizance over the installation of the products required to be certified must ensure that adequate control has been exercised to identify the product with its manufacturer or mill certificate.(c) In the event that the Officer in Charge, Marine Inspection, determines that handling of a product has been such that proper identification is not possible, he may: (1) Require testing in his presence based on the applicable material or fabrication specification; or(2) Reject the product on the basis that it cannot be properly identified.(d) A product conforming to an acceptable material specification may, at the discretion of the Officer in Charge, Marine Inspection, be accepted without referring to its manufacturer or mill certification, if:(1) The product is marked in accordance with the identification marking requirements of the specification;(2) The marking alone is sufficient to identify that specification; and(3) In the opinion of the Officer in Charge, Marine Inspection, the application of the product does not require knowledge of the exact chemical analysis or mechanical properties enumerated on the manufacturer or mill certificate.CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 40598, Oct. 2, 1989