What Are Critical Tracking Events (CTEs)?
Critical Tracking Events are 7 specific activities in the food supply chain where FSMA 204 requires documented traceability records. Each CTE has its own set of Key Data Elements (KDEs) that must be recorded, retained for 2 years, and made available to the FDA within 24 hours of a request (Source: 21 CFR Part 1, Subpart S).
What are the 7 Critical Tracking Events?
| # | CTE | Who Performs It | When It Happens | |---|-----|-----------------|-----------------| | 1 | Harvesting | Farms, farm mixed-type facilities | Removing raw agricultural commodities (RACs) from growing locations | | 2 | Cooling | Any entity cooling before initial packing | Active temperature reduction of RACs | | 3 | Initial Packing | First-time packers of RACs | First packing of raw agricultural commodities | | 4 | First Land-Based Receiving | First person on land receiving from a fishing vessel | Taking possession of fishing vessel food on land | | 5 | Shipping | Any entity arranging transport | Moving FTL food between locations | | 6 | Receiving | Any entity taking possession after transport | Taking physical possession after transportation | | 7 | Transformation | Manufacturers, processors | Manufacturing, processing, commingling, repacking, or relabeling |
Each CTE captures a different moment in the supply chain. Together, they create a traceable path from farm or vessel to consumer.
How do CTEs connect across the supply chain?
Food on the Traceability List flows through CTEs in a predictable sequence. Not every food passes through every CTE, but the chain always follows this order:
FARM (Harvesting CTE)
Records: commodity, variety, quantity, farm location, field name, harvest date
Passes forward to --> Cooler or Initial Packer
|
v
COOLER (Cooling CTE - if active cooling occurs before packing)
Records: commodity, quantity, cooling location, cooling date, farm location
Passes forward to --> Initial Packer
|
v
INITIAL PACKER (Initial Packing CTE) -- ASSIGNS FIRST TLC
Records: all harvest/cooling info + TLC, product description, packed quantity
Passes forward to --> Shipper or next recipient
|
v
SHIPPER (Shipping CTE)
Records: TLC, quantity, product description, recipient, ship-from, date, TLC source
Passes forward to --> Recipient
|
v
RECEIVER (Receiving CTE) -- e.g., restaurant, distributor, retailer
Records: TLC, quantity, product description, previous source, receiving location, date
|
v (if applicable)
TRANSFORMER (Transformation CTE) -- ASSIGNS NEW TLC
Records INPUT: TLC(s), product description(s), quantity from each input lot
Records OUTPUT: new TLC, transformation location, date, product description, quantity
Passes forward to --> Next recipient with new TLC
For seafood, the First Land-Based Receiver replaces the Harvesting and Initial Packing CTEs. That receiver assigns the first TLC when fish arrives on land from a vessel.
What is the Harvesting CTE?
The Harvesting CTE applies to farms and farm mixed-type facilities when they remove raw agricultural commodities from where they were grown or raised (Source: 21 CFR 1.1325(a)).
Required KDEs: 8 data elements including commodity and variety, quantity, farm location description, field or growing area name, harvest date, and recipient information.
Harvesters must pass their business name, phone number, and all KDEs forward to the initial packer.
What is the Cooling CTE?
The Cooling CTE applies to any entity that actively reduces the temperature of a raw agricultural commodity before initial packing (Source: 21 CFR 1.1325(b)). Covered cooling methods include hydrocooling, forced air cooling, vacuum cooling, and icing (except seafood icing).
Required KDEs: 7 data elements including commodity, quantity, cooling location, cooling date, harvest farm location, subsequent recipient, and reference document.
This is the one CTE where IoT temperature sensors have direct regulatory relevance under FSMA 204 -- documenting active temperature reduction is inherently a temperature-data problem.
What is the Initial Packing CTE?
The Initial Packing CTE applies to the entity that first packs a raw agricultural commodity (Source: 21 CFR 1.1330). This is where the first Traceability Lot Code (TLC) is assigned. The packing location becomes the TLC source.
Required KDEs: 16 data elements -- the most of any CTE. These include all upstream harvest and cooling information plus the newly assigned TLC, product description, packed quantity, packing location, and date.
Sprout packers have additional KDEs covering seed grower information, seed lot codes, and antimicrobial treatment records.
What is the First Land-Based Receiving CTE?
This CTE applies to the first person who takes possession of food from a fishing vessel on land (Source: 21 CFR 1.1335). It is the seafood equivalent of Initial Packing -- the first TLC is assigned here.
Required KDEs: 7 data elements including the newly assigned TLC, species or product description, quantity, harvest date range and locations, receiver location, landing date, and reference document.
Harvest locations must use recognized geographic standards such as NMFS Ocean Geographic Codes or UN FAO Major Fishing Areas.
What is the Shipping CTE?
The Shipping CTE applies to any entity that arranges transport of FTL food between locations (Source: 21 CFR 1.1340). It does not apply to shipments before initial packing, direct-to-consumer sales, or surplus food donations.
Required KDEs: 8 data elements including TLC, quantity, product description, recipient location, shipping location, ship date, TLC source, and reference document.
The shipper must pass items 1 through 7 forward to the immediate subsequent recipient.
What is the Receiving CTE?
The Receiving CTE applies to any entity taking possession of FTL food after transportation -- including restaurants, distributors, retailers, and processors (Source: 21 CFR 1.1345).
Required KDEs: 8 data elements including TLC, quantity, product description, previous source, receiving location, date received, TLC source, and reference document.
For restaurants, this is the only CTE that applies. Most of the required information already appears on delivery invoices and packing slips.
What is the Transformation CTE?
The Transformation CTE applies when food is manufactured, processed, commingled, repacked, or relabeled and the output is a food on the FTL (Source: 21 CFR 1.1350). A new TLC must be assigned to the output, and input TLCs must be linked to it.
Required KDEs: 3 per input lot + 6 for the output. Input records capture each input TLC, product description, and quantity used. Output records capture the new TLC, transformation location, date, product description, quantity, and reference document.
Restaurants cooking food for direct consumer sale are exempt. However, restaurant commissaries and central kitchens that ship to satellite locations are treated as processors.
How long must CTE records be retained?
All CTE and KDE records must be retained for 2 years (24 months) from the date they were created (Source: 21 CFR 1.1455). Key retention rules:
- Format: Original paper, electronic records, or true copies
- Storage: Records may be stored offsite if retrievable within 24 hours
- Electronic records: Considered "onsite" if accessible from an onsite location
- Third-party maintenance: Allowed, but the covered entity remains legally responsible
- Electronic sortable spreadsheet: Required during outbreak investigations for entities above revenue thresholds
Which CTEs apply to which businesses?
| Business Type | Applicable CTEs | |--------------|-----------------| | Produce farms | Harvesting, possibly Cooling and Initial Packing | | Cooling facilities | Cooling | | Packing houses | Initial Packing, Shipping | | Seafood first receivers | First Land-Based Receiving, Shipping | | Food distributors | Receiving, Shipping | | Food processors | Receiving, Transformation, Shipping | | Restaurants | Receiving only | | Retailers | Receiving only | | Transport carriers | None (carriers do not perform CTEs) |
Most businesses only deal with 2-3 CTEs. Restaurants have the lightest burden with just one.