Operators must comply with all requirements of 49 CFR, Part 175 (see US 1). These requirements include, but are not limited to, the following:

1. A package prepared in accordance with these Technical Instructions for transport to, from or within the United States must not be accepted unless the shipper has complied with all applicable United States variations indicated in these Technical Instructions.

2. A copy of the transport document, or an electronic image thereof, must be retained by the initial operator for not less than one year after the dangerous goods are accepted by the initial operator. Each shipping paper copy must include the date of acceptance by the initial operator. The date on the shipping paper may be the date a shipper notifies the air carrier that a shipment is ready for transportation, as indicated on the airway bill or bill of lading, as an alternative to the date the shipment is picked up or accepted by the carrier. For a hazardous waste, the transport document copy must be retained for three years after the waste material is accepted by the initial operator.

3. The notification to pilot-in-command must list, and provide the required information for, those additional materials considered to be dangerous goods under United States regulations as indicated through United States variations.

4. Except for limited or excepted quantity materials, substances of Class 9, articles of UN 0012, UN 0014 or UN 0055 meeting the requirements of 49 CFR 173.63 (b), articles of UN 3528 or UN 3529, aircraft batteries transported as items of replacement (49 CFR 175.8), and those articles and substances considered to be dangerous goods under these Technical Instructions but which are not subject to 49 CFR Parts 170-180, the following limitations apply:

   1. No more than 25 kg net weight of dangerous goods, and in addition thereto, 75 kg net weight of non-flammable gas, that are permitted to be carried aboard a passenger aircraft may be loaded aboard an aircraft in an inaccessible manner.

   2. For transport by cargo aircraft, the following additional substances are also excepted from the above requirement:

      1. Class 3 (flammable liquid), Packing Group III (unless the substance is also labelled CORROSIVE).

      2. Division 6.1 (toxic), (unless the substance is also labeled for any hazard class or division except FLAMMABLE LIQUID).

      3. Division 6.2 (infectious substances).

      4. Class 7 (radioactive) material that does not meet the definition of another hazard class.

      5. Class 9 (miscellaneous), limited quantity or excepted quantity material.

      6. Articles of UN 0012, UN 0014 or UN 0055 also meeting the requirements of 49 CFR 173.63(b).

      7. Articles of UN 3528 or UN 3529.

   - Note 1.- Accessible means, on passenger-carrying or cargo-only aircraft, that each package is loaded where a crew member or other authorized person can access, handle, and, when size and weight permit, separate such packages from other cargo during flight, including a freight container in an accessible cargo compartment when packages are loaded in an accessible manner. Additionally, a package is considered accessible when transported on a cargo-only aircraft if it is:

   - in a cargo compartment certified by FAA as a Class C aircraft cargo compartment as defined in 14 CFR 25.857(c); or

   - in an FAA-certified freight container that has an approved fire or smoke detection system and fire suppression system equivalent to that required by the certification requirements for a Class C aircraft cargo compartment.

   - Note 2.- Inaccessible means all other configurations, including packages loaded where a crew member or other authorized person cannot access, handle, and, when size and weight permit, separate such packages from other cargo during flight, including a freight container in an accessible cargo compartment when packages are loaded in an inaccessible manner.

   The following table provides the limits imposed by this variation:

   Applicability | Forbidden | Quantity limitation: 25 kg net weight of dangerous goods plus 75 kg net weight of non-flammable gas per cargo compartment | No limit
   Passenger carrying aircraft | Cargo aircraft only labelled packages | Inaccessible | Accessible
   Cargo-only aircraft - packages authorized aboard a passenger-carrying aircraft | Not applicable | Inaccessible | Accessible
   Cargo-only aircraft - packages not authorized aboard a passenger-carrying aircraft and displaying a cargo-aircraft-only label | Inaccessible | Not applicable | Accessible

5. Operators must comply with the incident reporting requirements of 49 CFR 171.15, 171.16 and discrepancy reporting under 175.31.

- Note.- Copies of the incident reporting form and guidance for completing it may be downloaded at:

  http://www.phmsa.dot.gov/hazmat/incident-reports.