(a) The total amount of reduced-CI crop and associated CI must be maintained and tracked from the farm to the biofuel refiner using records and mass balance accounting.

(b) Crops with different CIs can be physically mixed at any entity along the supply-chain.

(c) Processed products derived from crops (for example, seed oils) can be produced using crops with different CIs.

(d) All entities specified in § 2100.010 must maintain required documentation for 5 years from when reduced-CI crops or processed products are sold, including documentation of previous verification activities and audits conducted as required by this part. Documentation must be readily available to accredited third-party verifiers and provided upon request during an audit.