The one-step-back, one-step-forward records the law asks of you — and why full lot genealogy has to go further than that minimum.
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After this lesson you can state your own one-up and one-down for any product — the supplier one step behind each input, the customer one step ahead of each output — and point to the exact place the legal minimum stops and real genealogy has to take over.
The baseline nearly every food business owes is . It has a name in operations because it has a home in federal law.
That home is the recordkeeping rule from the Public Health Security and Bioterrorism Preparedness and Response Act of 2002 — the Bioterrorism Act — codified at 21 CFR Part 1, Subpart J. Two sections carry the weight: 21 CFR 1.337 tells you to keep records identifying the immediate previous source of each food you receive, and 21 CFR 1.345 tells you to keep records identifying the immediate subsequent recipient of each food you release. Read together, that is one step back and one step forward, written down. The rule reaches most people who manufacture, process, pack, hold, or distribute food, but it carves out exceptions — farms, restaurants, and others — so confirm how it lands on your operation rather than assuming.
If you carry a certification, the same floor shows up there. Under the SQF Food Safety Code, Edition 9, clause 2.6.2 makes one-up, one-down a documented requirement: your finished product has to trace forward to the customer who bought it and back to the supplier the material came from, one link each way. Clause 2.6.3.2 goes further and makes you prove it: the withdrawal and recall system has to be tested and verified as effective at least once a year, and that test has to run traceability both directions — one step back from incoming materials, one step forward to finished product. The floor is not just something you have — it is something an auditor watches you produce.
Three authorities, one minimum
The Bioterrorism Act rule is federal law that reaches most food businesses. SQF is a certification requirement that binds you only if you hold that certificate. The Food Traceability Rule — the next lesson — is a separate rule that covers only certain foods. They are three different authorities, and each sets the same one-up, one-down minimum. Know which of them apply to you.
One-up, one-down is really two traces, and a recall asks both.
Both are one link long. That is the point of the floor and also its limit: it proves you can name your neighbors on either side of you in the chain. It does not, on its own, connect a particular input lot to the particular finished lot it ended up in.
The gap the minimum leaves is not out at your suppliers or your customers. It is inside your own building, at the step where inputs become product.
Say a supplier calls: one lot of an ingredient they shipped you is under recall. One-up, one-down tells you that ingredient came from that supplier — backward, one step, done. It does not tell you which of your batches that specific lot went into, or which finished lots those batches became, or which customers took them. Without those internal links you are left with two bad options: pull every product you ever made from that supplier, far wider than the actual problem, or reconstruct the chain by hand from paper while the clock runs.
That internal step — the transformation of inputs into a new product — is exactly where a lot field quietly breaks, and where the next reach up has to happen.
Full genealogy carries the link all the way through, with no break at the transformation step. It is . Three records hold it together:
Receiving ties each incoming lot to a code
When material comes in, its lot is captured against your own identifier, not left as a number in a box. Now the input is something later records can point back to.
Production records which exact input lots fed which batch
The batch record names the specific input lots consumed and the finished lot code it produced. This is the link the floor never asks for and the whole trace depends on — the seam between what came in and what went out.
Shipping ties each finished lot to its customers
Every shipment carries the finished-lot code, so a lot leaving your dock is connected to the customer who received it, not just to a date.
With those links in place, the supplier's call has a precise answer: that ingredient lot fed these two batches, which became these finished lots, which shipped to these customers — and nothing else is in scope. The trace stops being an investigation and becomes a lookup.
Software built for food holds this as links between lots rather than as a value in a column. Bettr Manager — the operations platform this site is part of — works that way, tying each received lot through the batches it feeds to the shipments it reaches; it is one way to hold the genealogy this lesson describes, not the only one. A disciplined paper system with real cross-references clears the same bar — it just takes far more hand-work to keep the links honest. For a concrete look at capturing a lot at the first seam, the docs walkthrough on receiving a purchase order shows one way to record it so it stays connected downstream.
For foods on FDA's Food Traceability List, the law has already moved past one-up, one-down. Under the Food Traceability Rule (FSMA Section 204, 21 CFR 1.1350), when you transform a listed food you have to keep records that link the input lots to the new you give the output — the input codes tied to the output code, genealogy written into the regulation. Its compliance date was pushed to July 20, 2028, from the original January 20, 2026; confirm the current date on FDA's Food Traceability Rule page rather than trusting any number here. The next lesson works through what that rule actually asks you to record.
First, prove you can produce your own one-up and one-down — and then see how far past it your records really reach.
Do this in your operation