Cold chain standards come from several separate bodies, each covering a different slice of the chain, and no single organization owns the whole subject. A shipment can be simultaneously subject to an airline's handling rules, a packaging test standard, a management-system certification, and a national medicines regulator's requirements, each written by a different body for a different purpose, and confusing one for another is a common source of mistakes.
Knowing which body governs which part of a shipment matters more than memorizing any single rule, because the right document to check depends entirely on what is moving, by what mode, and for what industry. A vaccine shipment moving by air answers to a different mix of standards than a chilled seafood shipment moving by truck, even though both are, in the broadest sense, cold chain.
IATA governs how air transport handles the shipment
The International Air Transport Association publishes the operating rules airlines and cargo handlers follow for shipments moving by air, covering how temperature-sensitive cargo is accepted, labelled, packed for the aircraft hold, and handled during transfers between flights. Its Temperature Control Regulations set out packaging and handling requirements specifically for pharmaceutical air shipments, distinct from its wider dangerous goods rules covering things like dry ice.
A separate IATA program, CEIV Pharma, certifies airports, airlines, and handling agents against a shared pharmaceutical handling standard, giving shippers a way to identify partners already assessed against the same criteria rather than auditing each one individually. None of this applies once a shipment leaves the air network for road or sea, where different bodies and rules take over.
ISTA sets the test methods packaging is measured against
The International Safe Transit Association publishes standardized test procedures for shipping packaging, defining exactly how a box should be dropped, vibrated, compressed, and temperature-cycled in a lab to simulate what it experiences in real transit. ISTA does not certify a specific product as safe; it defines the test method a packaging engineer runs, and different test series exist for different shipment profiles, from small parcels to full pallet loads.
A packaging design, often a passive foam shipper built from expanded polystyrene, that passes an ISTA temperature-cycling test has been shown to hold its stated performance under a defined, repeatable simulation, which is what lets a shipper compare two competing package designs on equal terms rather than trusting a manufacturer's own claims.
ISO covers the management system, not the shipment itself
The International Organization for Standardization publishes management-system standards, most relevantly around quality management and, for temperature-sensitive goods specifically, good distribution and storage practice. These standards certify that a company runs a consistent, documented process, training staff correctly, recording deviations, and following the same procedure every time, rather than testing any individual shipment or package.
This is the distinction worth holding onto: ISO certifies the process a company follows, IATA and ISTA govern how a specific shipment or package performs. A company can be well certified on the management side and still fail an individual shipment through a handling error, because the two kinds of standard answer different questions.
National regulators own medicines specifically
Medicines carry an added layer beyond transport and packaging standards: each country's own medicines regulator, agencies such as the FDA in the United States, the EMA in the European Union, and the MHRA in the United Kingdom, sets requirements for how pharmaceutical products are stored in a cold storage warehouse, distributed, and documented within that jurisdiction. These requirements sit on top of, not instead of, the transport and packaging standards already covering the same shipment.
This layering is why a single pharmaceutical shipment moving internationally can answer to IATA rules in the air, ISTA-tested packaging protecting it physically, and then a different national medicines regulator's requirements once it lands in each destination country, with no one body reconciling the three for the shipper.
Reading the map instead of one document
The practical use of this outline is knowing which document to open for a given question. A packaging performance question points to ISTA. An air handling or labelling question points to IATA. A question about whether a company's overall process is properly documented points to ISO. A question about a specific medicine's legal distribution requirements in a specific country points to that country's own regulator.
None of these bodies substitutes for another, and none of them alone covers a full shipment end to end. Industry groups such as GCCA sit alongside them as a reference point for storage and warehousing practice specifically, completing a picture with no single owner by design, only overlapping pieces each covering the part they were built for.