19 CFR 141.55: Single entry summary for shipments arriving under one transportation entry.

Except for merchandise subject to a quantitative or tariff-rate quota, port directors are authorized to accept one entry summary for consumption or for warehouse for the entire quantity of merchandise covered by an entry for immediate transportation after the arrival of any part of the merchandise at the port of destination or at a place of deposit outside the port as may be authorized in accordance with § 18.11(c) of this chapter.