Other fish, frozen

1. Scope and Applicability

This rule covers processor-gate frozen whole finfish in the residual category CPC 21219, including uneviscerated or eviscerated fish with or without heads. Declare species, wild or farmed origin, head and gut state, freezing method, glaze, packaging, and storage duration. The rule covers reception through freezing, optional gutting and glazing, packing, and on-site frozen storage. Upstream fishing or aquaculture is represented by the received raw-fish input and its linked upstream dataset. Transport after the processor gate, retail, cooking, and disposal are outside this foreground boundary. [un-cpc-3-2025; fao-cxs-36-1981; fao-cac-rcp-52-2012]

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.food-products-beverages-and-tobacco-textiles-apparel-and-leather-products.meat-fish-fruits-vegetables-oils-and-fats.other-fish-frozen
classification_refs	CPC 3.0 21219, residual other fish, frozen [un-cpc-3-2025]
covered_products	Frozen whole finfish not assigned to CPC 21211–21216; uneviscerated or eviscerated, with or without head
excluded_products	Live, fresh or chilled fish; frozen fillets, fish meat, livers and roes; named frozen-fish subclasses 21211–21216 [un-cpc-3-2025]
representative_product	Frozen whole residual-category finfish at processor gate, net fish mass excluding glaze and packaging
production_route	Raw whole-fish reception, optional gutting, quick freezing, optional glazing, packing and frozen storage
market_state	Frozen whole fish; species, origin, presentation and glaze declared

3. Reference Flow

Field	Value
What	Frozen whole finfish in the residual other-fish category at processor gate
How much	1 kg net fish mass, excluding glaze and packaging
How well	Product frozen and held at or colder than −18 °C at the thermal centre after stabilization for quick-frozen product; record the actual standard applied [fao-cxs-36-1981]
How long or cycle	One production lot through processor-gate release; declare on-site frozen storage duration
reference_flow_link	frozen_other_fish

Field	Value
Reference amount	1
Reference product flow	Other fish, frozen
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	species; wild or farmed origin; whole/head/gut presentation; frozen temperature and method; glaze present and mass; packaging; on-site frozen storage duration; geographic and technological scope

The reference quantity is measured net fish mass, excluding any protective ice glaze and packaging. Weigh a representative deglazed lot or use traceable net-content records reconciled to the production lot. [fao-cxs-36-1981; fao-cac-rcp-52-2012]

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	frozen_other_fish	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Measure accepted net fish mass, excluding glaze and packaging, using cp_output_mass; this is the 1 kg denominator.
input_normalization	all inventory rows	Row-specific property	row-specific	Record each exchange per production lot and divide by accepted net fish mass in kg using normalize_lot; preserve its original numerator unit.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Received raw whole fish at processor intake; record species, source, fresh/chilled/frozen condition and measured mass
starting_condition_role	Foreground starting input with upstream fish-production burden linked
product_classification_scope	Residual frozen whole fish CPC 21219; upstream raw fish retains its own origin and state classification
recursive_input_rule	If already frozen fish is reprocessed, disclose its incoming state and link its upstream product dataset once; do not model it again as newly landed raw fish.
upstream_dataset_requirement	Link representative wild-catch or aquaculture and inbound transport datasets for received fish; disclose unavailable links.
disclosure	Report species mix, source route, head/gut state, glaze, packaging, freezer technology, storage duration and any excluded exchanges.

rule_id	Applies to	Rule	source_ids
boundary_gate	foreground scope	Include reception, optional gutting, freezing, optional glazing, packing and on-site frozen storage until product release.	fao-cac-rcp-52-2012
boundary_upstream	raw_whole_fish	Link the actual received-fish upstream route and avoid double counting upstream production.

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
fish_freezing	Whole-fish reception, freezing, packing and storage	required	All covered lots	Foreground production	Per 1 kg accepted net frozen fish mass

Process: Whole-fish reception, freezing, packing and storage (fish_freezing)

Inputs

Product flows

Received raw whole fish (raw_whole_fish)

Received raw whole fish crosses the foreground boundary as one product input.

• Selected flow: Fresh or chilled whole fish in the residual species scope
• Flow property / unit: Mass / kg
• Amount rule: Weigh accepted fish entering the process per production lot.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_raw_fish
• Sources: fao-cac-rcp-52-2012

Tap water for optional glazing (glazing_tap_water)

Tap water for optional glazing crosses the foreground boundary as one product input. Include only when glazing with tap water.

• Selected flow: Tap water d1e0e36c-07f0-4a75-bdcb-efb5d9e2ac36
• Flow property / unit: Mass / kg
• Amount rule: Measure potable tap water supplied for glaze per lot; zero only when glazing is absent.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_glazing_water
• Sources: fao-cxs-36-1981

Electricity for freezing and on-site storage (freezing_electricity)

Electricity for freezing and on-site storage crosses the foreground boundary as one product input.

• Selected flow: Alternating current electricity
• Flow property / unit: Energy / MJ
• Amount rule: Measure attributable electricity for freezing, packing and frozen storage over the lot storage interval.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electricity
• Sources: fao-cac-rcp-52-2012

Polyethylene packaging film (polyethylene_film)

Polyethylene packaging film crosses the foreground boundary as one product input. Include only when polyethylene film route.

• Selected flow: Polyethylene packaging film
• Flow property / unit: Mass / kg
• Amount rule: Weigh film consumed in packaging the accepted lot; use another atomic row for a different resin.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_film
• Sources: fao-cxs-36-1981

Waste flows

Elementary flows

Outputs

Product flows

Frozen other whole fish (frozen_other_fish)

Accepted frozen whole-fish output is the reference product at processor gate. Exclude glaze and packaging from its net mass.

• Selected flow: Other fish, frozen
• Flow property / unit: Mass / kg
• Amount rule: 1 kg
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_output_mass
• Sources: fao-cxs-36-1981

Waste flows

Fish viscera from optional gutting (fish_viscera)

Record segregated fish viscera removed during gutting as one waste output; this row applies only when gutting occurs.

• Selected flow: Fish viscera
• Flow property / unit: Mass / kg
• Amount rule: Weigh segregated viscera per production lot; zero only if no gutting occurs.
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg reference flow
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_viscera
• Sources: fao-cac-rcp-52-2012

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivide	jointly operated lines	First subdivide metered freezing and storage activities by line or lot where records permit.	fao-cac-rcp-52-2012
allocation_shared	shared fish-processing inputs	If subdivision is unavailable, quantify a causal allocation using metered equipment time or another measured physical driver, disclose the driver and co-products, and seek review if no defensible driver exists.
allocation_byproduct	fish_viscera	Record viscera as waste when disposed; if sold as a product, report its mass, destination and a separately justified allocation decision instead of silently assigning zero burden.	fao-cac-rcp-52-2012

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_raw_fish	fish_freezing	raw_whole_fish	receiving and scale records	lot; species; origin; raw mass; condition	Calibrated scale or reconciled intake records	kg	each lot	production campaign	processor gate	per 1 kg reference flow	scale calibration and intake tickets
cp_glazing_water	fish_freezing	glazing_tap_water	water meter and batch records	lot; potable-water mass; glazing status	Meter or weigh supplied tap water	kg	each glazing lot	production campaign	processor gate	per 1 kg reference flow	meter and potable-water records
cp_electricity	fish_freezing	freezing_electricity	electricity meter and freezer log	lot; meter readings; freezer run time; storage duration	Meter electricity and allocate shared draw by recorded operating time	MJ	each lot or campaign	reception to release	processor gate	per 1 kg reference flow	meter calibration and log
cp_film	fish_freezing	polyethylene_film	packaging issue records	lot; film resin; issued mass; returned mass	Weigh net polyethylene film issued to lot	kg	each lot	production campaign	processor gate	per 1 kg reference flow	resin specification and stock reconciliation
cp_output_mass	fish_freezing	frozen_other_fish	deglazed scale and release records	lot; species; presentation; gross mass; glaze mass; net fish mass	Weigh deglazed accepted fish or reconcile traceable net-content records	kg	each lot	release at processor gate	processor gate	per 1 kg reference flow	calibrated scale, deglazing and release records
cp_viscera	fish_freezing	fish_viscera	segregated waste scale records	lot; gutting status; viscera mass; destination	Weigh segregated viscera	kg	each gutted lot	production campaign	processor gate	per 1 kg reference flow	waste tickets and mass balance

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
normalize_lot	all inventory rows	q_ref = q_lot / m_net, where m_net is accepted net fish mass excluding glaze and packaging; retain each row's numerator unit.	q_lot; m_net; cp_output_mass	q_ref per 1 kg reference flow	fao-cxs-36-1981
reconcile_mass	raw_whole_fish; frozen_other_fish; fish_viscera	Reconcile measured incoming fish with accepted net fish, viscera and documented process losses; investigate unexplained difference rather than assume zero.	cp_raw_fish; cp_output_mass; cp_viscera	mass-balance check	fao-cac-rcp-52-2012

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	all lots	Record species, origin, head/gut state, packaging resin and product state.	intake, packaging and release records
dq_net_mass	frozen_other_fish	Separate glaze and packaging from fish net mass.	deglazing, scale and label records [fao-cxs-36-1981]
dq_cold_chain	frozen_other_fish	Retain freezing thermal-centre and cold-store temperature records with storage duration.	calibrated thermometer and freezer logs [fao-cac-rcp-52-2012]
dq_completeness	all inventory rows	Reconcile meters and material tickets to the same lot and report missing coverage.	lot reconciliation records

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_identity	reference product	Reject a dataset that substitutes fillets, minced fish, liver, roe or a named frozen-fish subclass for residual whole fish.	un-cpc-3-2025
validate_net_mass	frozen_other_fish	Check that reference mass is accepted fish mass excluding glaze and packaging and that all rows use the same 1 kg denominator.	fao-cxs-36-1981
validate_routes	conditional rows	Require glazing-water records when glazed, viscera records when gutted, and a documented packaging film material when used.	fao-cac-rcp-52-2012
validate_temperature	frozen_other_fish	For a quick-frozen claim, verify thermal-centre temperature at or colder than −18 °C after stabilization and disclose storage conditions.	fao-cxs-36-1981

10. Published Dataset Profile

Field	Value
dataset_role	Processor-gate foreground data package for other frozen whole fish
downstream_use	Publish product flow, process and lifecyclemodel projections after dataset checks
allowed_use	Product-specific frozen whole-fish modelling with declared species, origin and technology
excluded_use	Generic fillets, minced fish, fish liver/roe or named frozen-fish subclass modelling
required_metadata	Species mix; source route; presentation; net mass; freezing method and temperature; glaze; packaging; storage duration; geography
required_quality_disclosure	Meter coverage, allocation, mass balance, missing flow UUIDs, missing ranges and upstream data links
update_trigger	Change in species mix, source route, freezing technology, packaging or storage regime

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-2025	official_guidance	CPC Ver. 3.0 Explanatory Notes, 30 June 2025, section 21219; https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf	Product boundary and exclusions
fao-cxs-36-1981	standard	Codex Standard for Quick Frozen Finfish, Uneviscerated and Eviscerated, CXS 36-1981, revised 1995, amended 2013; https://www.fao.org/input/download/standards/103/CXS_036e.pdf	Whole-fish state, freezing, net mass and glaze
fao-cac-rcp-52-2012	official_guidance	Code of Practice for Fish and Fishery Products, second edition, 2012, sections 8.1 and 8.3; https://www.fao.org/4/i2382e/i2382e.pdf	Reception, freezing, glazing and cold-storage records