(a) Certification requirements. For any product offered for preferred procurement, manufacturers and vendors must certify that the product meets the biobased content requirements for the designated item within which the product falls. Paragraph (c) of this section addresses how to determine biobased content. Upon request, manufacturers and vendors must provide USDA and Federal agencies information to verify biobased content for products certified to qualify for preferred procurement.

(b) Minimum biobased content. Unless specified otherwise in the designation of a particular item, the minimum biobased content requirements in a specific item designation refer to the biobased portion of the product, and not the entire product.

(c) Determining biobased content. Verification of biobased content must be based on third party ASTM/ISO compliant test facility testing using the ASTM International Radioisotope Standard Method D 6866. ASTM International Radioisotope Standard Method D 6866 determines biobased content based on the amount of biobased carbon in the material or product as percent of the weight (mass) of the total organic carbon in the material or product.

(d) Products with the same formulation. In the case of products that are essentially the same formulation, but marketed under a variety of brand names, biobased content test data need not be brand-name specific.