D.C. Mun. Regs. tit. 25-B, § 2604
2604.1 When the entire cargo consists of shellfish products only, except for bulk shipments, shellstock shipments shall be shipped on pallets. If the conveyance does not have a channeled floor, pallets shall be used for all shellfish.
2604.2 When the conveyance has mixed cargos, the shellfish shall be shipped as part of a mixed cargo of seafood or other food products only when:
(a) Shellfish products are protected from contamination by the other cargo;
(b) All cargo is placed on pallets; and
(c) No other cargo is placed on or above the shellfish unless all cargo is packed in sealed, crush resistant, waterproof containers.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).