Interstate Conveyance Sanitation

When you eat a meal on an Amtrak train, board a flight serving food, or ride a cross-country bus, the food service and sanitary conditions on that conveyance fall under a little-known FDA regulatory framework: 21 CFR Part 1250 — Interstate Conveyance Sanitation. Authorized by the Public Health Service Act (42 U.S.C. § 216), this regulation extends FDA's food safety authority onto moving vehicles — trains, aircraft, and highway conveyances — that cross state lines. The rules govern galley construction, food storage temperatures, water system integrity, drinking utensil sanitation, toilet and lavatory facility design, waste disposal, and the health of food-handling crew members. While less famous than the FDA regulations governing restaurant kitchens or food manufacturing plants, Part 1250 is the regulatory backbone ensuring that the food served during your cross-country train trip meets the same basic safety standards as a federally inspected food establishment on land.

Legal Authority

• 42 U.S.C. § 216 — Public Health Service Act; authorizes FDA to promulgate regulations to prevent the introduction, transmission, or spread of communicable diseases through interstate commerce, including through vehicles (ships, aircraft, trains, buses) that carry passengers in interstate or foreign commerce
• 21 CFR Part 1240 — FDA's Interstate Conveyance Sanitation regulation; establishes specific sanitation requirements for sanitary facilities, potable water, food service, waste disposal, and pest control on vessels, aircraft, trains, and buses engaged in interstate commerce

Key Mechanics

21 CFR Part 1240 applies to any "conveyance" — vessel, aircraft, car, bus, or other vehicle — used to transport persons in interstate commerce. The rule establishes minimum standards for toilet facilities (one toilet per 75 persons capacity, proper ventilation, hot and cold running water), potable water (must meet EPA drinking water standards, with monitoring and records), food service (licensed food handlers, refrigeration, hygienic preparation), waste disposal (sewage overboard discharge prohibited in harbor or navigable waters within three nautical miles of shore), and vector control (insect and rodent exclusion). FDA's Office of Food Safety is the primary enforcement agency; FDA inspectors board commercial vessels, aircraft, and trains to conduct sanitation inspections — the same authority that gives the FDA's "Vessel Sanitation Program" authority over cruise ships. Vessels with persistently deficient scores may be detained. The rule interacts with CDC's quarantine station authority (42 CFR Part 71) for international conveyances arriving from foreign ports with potential disease aboard. Airlines operating international flights are also subject to cabin sanitation requirements under ICAO standards, but FDA retains authority to inspect U.S.-flag carriers and enforce domestic standards.

Current Rule (2026)

What This Rule Does

Part 1250 extends FDA's food safety and public health authority to the vehicle itself — any conveyance (train, aircraft, bus) engaged in interstate traffic must comply with the sanitation requirements regardless of where in the country it is operating at a given moment. The statutory basis is the Public Health Service Act's communicable disease prevention authority: contaminated food and water on a conveyance moving across state lines creates a vector for multi-state disease outbreaks, placing it squarely in the federal government's constitutional authority over interstate commerce and public health.

The regulation is organized around three functions: (1) food service — what you eat on board; (2) sanitary equipment and facilities — toilets, water systems, and drinking utensils; and (3) servicing areas — the ground facilities where conveyances take on water, food, and provisions. All three must comply for a conveyance to be considered sanitary under federal law.

FDA's Commissioner (in practice, delegated to FDA inspectors) may inspect any interstate conveyance at any time to assess compliance. This inspection authority applies regardless of whether the carrier is a common carrier, charter carrier, or private carrier — as long as the vehicle crosses state lines in the course of its operations.

Key Provisions

Subpart A — Food Service Facilities (§§ 1250.20–1250.39)

• § 1250.20 — Applicability: all conveyances engaged in interstate traffic must comply with both Subpart A and 21 CFR § 1240.20 (the general communicable disease prevention requirements); the dual citation means Part 1250 food service rules work alongside the broader disease transmission prevention framework
• § 1250.22 — General food quality requirement: all food and drink served on conveyances must be clean, wholesome, and free from spoilage; prepared, stored, handled, and served in a manner that prevents contamination; this is the basic fitness-for-consumption standard parallel to what FDA requires of brick-and-mortar food establishments
• § 1250.25 — Source identification: carriers must identify, when requested, the vendors and distributors from whom they acquired food and drink; this enables traceback during a foodborne illness outbreak — the same product-tracing requirement that applies in fixed food establishments applies to the galley of a cross-country train
• § 1250.26 — Special food requirements: milk and fluid milk products must come from sources approved by state or local health authorities; shellfish (oysters, clams, mussels, scallops) must come from sources on the National Shellfish Sanitation Program (NSSP) list; these provisions prevent carriers from sourcing high-risk foods from unregulated suppliers
• § 1250.27 — Perishable food temperature: all perishable food or drink must be kept at or below 50°F, except when being prepared or actively kept hot for serving; the 50°F cold storage standard aligns with the FDA Food Code's general temperature danger zone requirements and prevents bacterial growth in proteins, dairy, and prepared foods stored in galley refrigeration
• § 1250.28 — Ice sourcing and handling: ice that contacts food or drink must come from sources approved by competent health authorities; commercially produced ice from regulated suppliers is the standard; ice storage must prevent contamination; self-manufactured ice (produced onboard) is permitted but must meet quality standards
• § 1250.30 — Galley and pantry construction: all kitchens, galleys, pantries, and food storage areas must be adequately lighted and ventilated; surfaces must be impervious and easily cleaned; the construction standard prevents accumulation of grease, mold, and pest harborage
• § 1250.32 — Food handling operations: all food handling must minimize contamination risk; food handlers must maintain clean hands; a food handler known or suspected to be in a communicable period or carrier of communicable disease may not handle food (§ 1250.35) — this is the rule that requires airline galley crews and railroad dining car employees to be disease-free during service
• § 1250.33 — Utensils: all utensils and working surfaces must be constructed to be easily cleaned and self-draining; utensils must be sanitized between uses

Subpart B — Sanitary Equipment and Facilities (§§ 1250.40–1250.53)

• § 1250.41 — Construction plan review: plans for construction or major reconstruction of sanitary equipment or facilities on conveyances must be submitted to FDA for review before construction begins; this allows FDA to catch sanitation design problems before they are built into the vehicle
• § 1250.42 — Water systems: the water system on a conveyance must be complete and closed from filling connections to discharge taps, with only protected vent openings; this closed-system requirement prevents backflow contamination from external sources or from the conveyance's own waste systems; water quality must meet FDA-approved standards; filling connections must be designed to prevent contamination during servicing
• § 1250.44 — Drinking utensils: no cup, glass, or other drinking utensil that may be used by more than one person may be provided unless it has been thoroughly cleaned and subjected to bactericidal treatment between uses; this provision is why airlines use disposable cups (meeting the standard by design) and why Amtrak's dining car must run a proper dishwashing operation — sanitizing through a temperature cycle or approved chemical treatment
• § 1250.45 — Railroad dining car kitchens: both kitchens and pantries of newly constructed or reconstructed cars must be equipped with double sinks, one deep enough for complete immersion of the largest utensil used; dishwashing equipment must achieve bactericidal temperatures or chemical sanitization; the detailed railroad-specific requirements reflect the fact that Part 1250 was developed primarily around rail sanitation before air travel became common
• § 1250.49 — Cleanliness during transit: conveyances must be kept clean and free of flies and mosquitoes while in transit; a conveyance found to be infected with vermin must be taken out of service until it has been effectively disinfested; the vermin control standard prevents insect-borne disease transmission on vessels crossing state or regional lines
• § 1250.50 — Toilet and lavatory facilities: where toilet facilities are provided, they must be designed for ready cleaning; on conveyances without waste retention, toilet hoppers must prevent spatter and splash; for conveyances with retention tanks, the tank must be adequate to hold all waste between servicing
• § 1250.51 — Railroad waste discharge: new railroad conveyances may not discharge human wastes, garbage, wastewater, or other polluting materials except at approved servicing areas; existing (legacy) railroad conveyances have separate provisions reflecting the historical practice of direct discharge to trackway (which was phased out as retention systems became standard)
• § 1250.52 / § 1250.53 — Highway and air conveyance waste: no discharge of excrement, garbage, or wastewater from highway or air conveyances except at FDA-approved servicing areas

Subpart C — Servicing Areas (§§ 1250.60–1250.61)

• § 1250.60 — Approved servicing areas: interstate conveyances may use only servicing areas within the United States that FDA has approved as meeting sanitation requirements; a servicing area is where water is taken on, waste is discharged, and provisions are loaded; the approval requirement prevents carriers from using unsanitary fueling or provisioning sites
• § 1250.61 — Servicing area inspection and approval: FDA may inspect any servicing area and may base its approval or disapproval on investigations made by State health department representatives; this creates a federal-state cooperative inspection framework for the ground-side infrastructure supporting interstate conveyances

How It Affects You

If you work for an airline, Amtrak, or intercity bus company: Part 1250 applies to your galley and food service operations. While FDA inspects conveyances less frequently than it inspects fixed food establishments (and the airline industry has additional USDA/FAA touchpoints), the requirement is real. If FDA inspects a conveyance and finds violations — improper food temperatures, unsanitary water system design, vermin infestation — it can order the vehicle out of service until corrected. Galley crew training on temperature control, food sourcing documentation, and handwashing compliance directly maps to Part 1250 requirements.

If you are a passenger who becomes ill after eating onboard: Food safety incidents on interstate conveyances are reportable to FDA's MedWatch system and to the carrier's home state public health authority. If a foodborne illness outbreak is traced to a specific conveyance or carrier, FDA's outbreak response team has authority to inspect the vehicle and review sourcing records under § 1250.25. The National Outbreak Reporting System (NORS) tracks restaurant-associated outbreaks broadly and includes conveyance-linked events.

If you are a state or local health official: Part 1250 creates a federal floor for conveyance sanitation that preempts state requirements that are inconsistent with or less stringent than the federal standard for interstate conveyances. States may conduct inspections on behalf of FDA under the cooperative framework at § 1250.61, and FDA relies heavily on state inspection capacity for both conveyances and servicing areas.

Statutory Authority

This rule implements:

• 42 U.S.C. § 216 — Public Health Service Act authority for the Secretary (delegated to FDA) to make and enforce regulations to prevent the introduction, transmission, or spread of communicable diseases through interstate commerce, including by regulating conditions on vehicles in interstate traffic
• 42 U.S.C. § 264 — Communicable disease quarantine and inspection authority (cross-referenced in the general framework at 21 CFR § 1240.20)

Recent Rulemakings

21 CFR Part 1250 has been largely stable since its original promulgation under the Public Health Service Act framework. The core requirements — food temperature standards, water system integrity, waste containment — have not changed substantially, though FDA has updated cross-referenced standards (e.g., shellfish sourcing requirements now reference the National Shellfish Sanitation Program database). The primary modern development in this space has been the aviation industry's development of HACCP-based food safety programs for airline catering, which operate in parallel with Part 1250 through voluntary industry standards developed with FDA collaboration.

Pending Action