Drawback claim procedure: shipping bill deemed claim on clearance, required documents and deficiency memo govern filing timeline. A triplicate copy of the Shipping Bill is deemed to be a claim for drawback when the proper officer permits clearance and loading and shall be retained. The claim must include specified export documents and, if materially incomplete, be returned with a deficiency memo within ten days and treated as not filed; resubmission after compliance is treated as filed on the original deemed filing date. Time taken for testing, up to one month, is excluded from the drawback payment period, and an electronic shipping bill filed in EDI is treated as the claim.