Who is responsible for temperature during food transport?

The shipper specifies the temperature that time/temperature control for safety foods need and puts it in writing. The carrier maintains that temperature during transport and, if asked, demonstrates it held with a log or data-logger record. A written agreement can move the duty between parties, but responsibility defaults to the shipper without one.

Does the FDA rule set a required temperature for hauling food?

No. The rule is performance-based and sets no national haul temperature. The shipper determines the operating temperature each food needs to stay safe, based on its hazard analysis and cold-chain science, and communicates it to the carrier. The load is judged against the shipper's specification, not a federal number.

Who is exempt from the Sanitary Transportation Rule?

Businesses with less than $500,000 in average annual revenue are exempt. FDA has also waived the rule for Grade A milk operations under the Pasteurized Milk Ordinance and for food establishments acting as receivers, or as shippers and carriers delivering food directly to consumers. Transport by ship or air is outside the rule entirely.

What records does the Sanitary Transportation Rule require?

Written sanitary and temperature procedures, written agreements that reassign duties, and carrier training records. Procedures and agreements are kept while in use plus 12 months. Except for training documentation, required retention generally does not exceed 12 months. Carriers must also be able to demonstrate temperature was maintained when the shipper requests it.

How is the Sanitary Transportation Rule different from HACCP?

HACCP controls hazards inside your facility; the Sanitary Transportation Rule extends food safety onto the truck and rail car. It focuses on transportation practices such as temperature control, vehicle cleanliness, and protection from contamination, and assigns duties across shippers, loaders, carriers, and receivers rather than at critical control points on a process line.

Sanitary Transportation of Food

Q: What is the Sanitary Transportation Rule?

It is an FDA rule finalized in April 2016 under FSMA, at 21 CFR Part 1 Subpart O, requiring shippers, loaders, carriers, and receivers to use sanitary practices when transporting food by truck or rail. It covers vehicles and equipment, transportation operations, records, training, and waivers, and applies whether or not the food crosses state lines.

How the FDA rule keeps food safe on the truck, who owns temperature, who cleans the trailer, and who proves it.

Sanitary transportation of food is the set of practices that keep food safe while it moves by truck or rail, clean and suitable vehicles, working temperature control, clear duties for everyone who touches the load, and records that prove the cold chain held. In the United States it is federal law under 21 CFR Part 1, Subpart O.

The rule closed an old gap. HACCP plans, sanitation programs, and preventive controls all stop at the dock door, but a load can spend days on a trailer that last hauled something it should never share space with, or ride warm because nobody agreed who owned the reefer setpoint. FDA's Sanitary Transportation of Human and Animal Food rule assigns those responsibilities in writing. This guide covers who the rule covers, what each party has to do, how temperature control works, the records and training it requires, and who is exempt.

What is the Sanitary Transportation Rule?

The Sanitary Transportation Rule is an FDA regulation, finalized in April 2016 under the FDA Food Safety Modernization Act, that requires shippers, loaders, carriers, and receivers to use sanitary practices when transporting food by motor vehicle or rail. It lives at 21 CFR Part 1, Subpart O and covers vehicles and equipment, transportation operations, records, training, and waivers.

Two boundaries are worth knowing up front. The rule reaches transportation by truck and rail only, transport by ship or air is outside its scope because of limits in the underlying law. And it applies to operations whether or not the food ever crosses a state line. The aim is narrow and practical: prevent the transportation practices that make food unsafe, such as failure to keep food cold, failure to clean a vehicle between incompatible loads, and failure to protect food from contamination in transit.

The rule is performance-based, not a lookup table. FDA does not publish a national list of haul temperatures. Instead it puts the burden on the parties to identify the conditions each food needs and to hold them. That design is why written agreements and specifications matter so much: they are where the actual numbers live.

Who does the rule cover?

The rule assigns duties to four roles, and one company can wear more than one hat on the same load. The roles are defined by what you do, not what you are called.

The four roles under 21 CFR Part 1 Subpart O. A single company can be shipper and carrier at once; the duties follow the activity, and a written agreement is what moves responsibility from one party to another.

Because duties can be reassigned by agreement, the most common failure is not a broken reefer, it is two parties who each assumed the other owned the temperature. The rule fixes that by making the shipper start the conversation in writing.

What are the shipper's responsibilities?

The shipper is the party that arranges the shipment, and under the rule it sits at the center. The shipper has to design the shipment so the food stays safe and then tell the other parties, in writing, what that requires.

Specify the sanitary requirements to the carrier in writing, including any temperature controls needed to keep the food safe during transport and any design specifications for the vehicle or equipment.
Set the operating temperature for time/temperature control for safety (TCS) foods, and communicate it, there is no federal default, so the shipper's number is the number.
Confirm the vehicle is suitable before loading, or delegate that check to the loader or carrier by written agreement.
Develop and use written procedures and keep them, so the requirements passed to carriers are consistent load to load.

A shipper can hand any of these tasks to the carrier or another covered party, but only under a written agreement that spells out who does what. Silence defaults the duty back to the shipper.

What must carriers do?

The carrier moves the food. When the carrier and shipper have agreed the carrier is responsible for sanitary conditions during transport, the carrier's core duties are:

Provide vehicles and equipment that meet the shipper's sanitary specifications and are in appropriate condition for the food being hauled.
Maintain the temperature the shipper specified throughout transport for TCS foods, and, if the shipper asks, demonstrate that the temperature was maintained, a downloaded reefer log, a printout, or a data-logger record.
Pre-cool a mechanically refrigerated unit before loading when the agreement calls for it.
Provide information to the shipper for bulk vehicles, about the prior cargo hauled and the most recent cleaning of the transport equipment, when the shipper requests it.
Train transportation personnel and keep the records when the carrier is responsible for sanitary conditions (covered below).

What do loaders and receivers do?

Loaders and receivers bookend the haul. Their jobs are shorter but they are where problems get caught.

The loader is the party that loads food onto a vehicle. Before loading food that is not completely enclosed by a container, the loader must determine that the vehicle and equipment are in appropriate sanitary condition, physically sound, free of visible pest infestation, and free of residue from a previous cargo that could make the food unsafe. For refrigerated loads, that includes confirming the unit is pre-cooled if required.

The receiver is the party that receives the food at the destination. On arrival, the receiver must assess that TCS food was not subjected to temperature conditions that render it unsafe, typically a temperature check at the door against the agreed specification, with a rejection and hold decision if the load ran warm. A documented receiving check here ties directly into a plant's GMP program and incoming inspection.

How does temperature control work under the rule?

Temperature control is handled by specification and demonstration, not by a mandated number. The shipper decides what temperature the food needs to stay safe, writes it into the requirements for the carrier, and the carrier holds it and can show it held. Nothing in the rule tells you a TCS food must ride at a specific degree, that judgment comes from the food's own hazard analysis and cold-chain science.

Under Subpart O there is no federal haul temperature. The shipper sets the required condition; the loader, carrier, and receiver each confirm it at their handoff. The line the load is measured against is the one the shipper wrote down.

This is where the rule connects to the rest of the cold chain. The same TCS logic drives shelf-life testing and the temperature limits a food safety team validates. A load that rides warm has not just risked spoilage, it may have burned time off a shelf life that was validated at a colder hold. Keeping transport temperature inside the specification protects the date on the label as much as it protects safety.

How do you comply, step by step?

For a food business that ships or receives, compliance is a short, repeatable loop rather than a one-time project.

Decide which roles you play. Map each lane: are you the shipper, the loader, the receiver, the carrier, or several at once? Duties attach to the activity.
Write the sanitary and temperature specifications. For each product and lane, document the vehicle requirements and the operating temperature TCS foods need to stay safe.
Put agreements in writing. Where a carrier or another party takes on a duty, holding temperature, checking the vehicle, training drivers, capture it in a written agreement so the responsibility is unambiguous.
Verify at the handoffs. Loaders confirm the vehicle is clean and pre-cooled; receivers check temperature and condition on arrival and reject out-of-spec loads.
Train the people who transport food when you are the carrier responsible for sanitary conditions, and document the training.
Keep the records for the required period and be able to retrieve them, procedures, agreements, and training documentation.

What records and training does the rule require?

The rule is light on records compared with a HACCP plan, but the records it does require have defined retention periods. Carriers responsible for sanitary conditions must train their transportation personnel in sanitary transportation practices and keep records of that training. Written procedures and written agreements have to be retained while in use and for 12 months after.

Record	Who keeps it	Retention
Written sanitary and temperature specifications / procedures	Shipper (and parties acting on them)	While in use, plus 12 months
Written agreements reassigning duties	The parties to the agreement	While in use, plus 12 months
Carrier training records	Carrier responsible for sanitary conditions	12 months beyond when the person does the work, or while employed, per the rule
Temperature demonstration (reefer log, data-logger)	Carrier, provided to shipper on request	Kept long enough to demonstrate; commonly not beyond 12 months

Records under Subpart O. Except for training documentation, required retention generally does not exceed 12 months. Confirm current specifics against the regulation and FDA's compliance guide.

Who is exempt from the rule?

Several groups fall outside the rule, either by size or by waiver.

Very small businesses. Shippers, loaders, receivers, and carriers with less than $500,000 in average annual revenue are not covered.
Shelf-stable and fully enclosed foods get lighter treatment: the rule focuses on foods that can be made unsafe by transport, so fully packaged shelf-stable food and food completely enclosed by a container that needs no temperature control are largely outside the operational requirements.
Waived sectors. FDA waived the rule for businesses holding valid permits under the Grade “A” Milk Safety Program (the Pasteurized Milk Ordinance) and for food establishments, restaurants, retail, and similar, acting as receivers, or as shippers and carriers when food is delivered directly to consumers.
Ship and air transport are outside the rule entirely, as are transporters of live food animals and food contact substances.

Being exempt from the rule does not exempt you from the outcome. A customer's supplier program, a GFSI audit, or your own HACCP hazard analysis can still require cold-chain controls and receiving checks that look a lot like Subpart O.

The rule at a glance

The primary sources every food-transport program should bookmark:

The regulation itself lives at 21 CFR Part 1, Subpart O covering vehicles, operations, records, training, and waivers (eCFR, Subpart O).
The final rule was published April 6, 2016 with large businesses complying by April 2017 and small businesses by April 2018 (FDA, FSMA final rule on sanitary transportation).
Businesses with less than $500,000 in average annual revenue are exempt and FDA has issued waivers for Grade “A” milk and certain food establishments (FDA Small Entity Compliance Guide).

Where the rule quietly bites is documentation. Written specs, written agreements, driver training records, and door-check temperatures are easy to define and easy to lose in a folder somewhere between the dock and the office. That is the same problem Harmony solves inside the plant: receiving checks, temperature logs, and sign-offs become live, searchable data instead of clipboard paper, so when a customer or auditor asks whether a load arrived in spec, the answer is a search away. One spirits manufacturer replaced its paper production logging entirely on the same foundation. When your traceability and receiving records connect to the systems you already run, no rip-and-replace, proving the cold chain held stops being a scramble.