9 C.F.R. § 91.13 – Aircraft.

(a) Prior to loading livestock aboard aircraft, the stowage area of the aircraft and any loading ramps, fittings, and equipment to be used in loading the animals must be cleaned and then disinfected with a disinfectant approved by the Administrator, to the satisfaction of an APHIS representative, unless the representative determines that the aircraft has already been cleaned and disinfected to his or her satisfaction.
1. (1) The Administrator will approve a disinfectant for purposes of this section upon determining that the disinfectant is effective against pathogens that may be spread by the animals and, if the disinfectant is a chemical disinfectant, that it is registered or exempted for the specified use by the U.S. Environmental Protection Agency.
2. (2) The Program Handbook provides access to a list of disinfectants approved by the Administrator for use as required by this section. Other disinfectants may also be approved by the Administrator in accordance with paragraph (a)(1) of this section.
3. (3) The Administrator will withdraw approval of a disinfectant, and remove it from the list of approved disinfectants in the Program Handbook, if the disinfectant no longer meets the conditions for approval in this section.
(b) The time at which the cleaning and disinfection are to be performed must be approved by the APHIS representative, who will give approval only if he or she determines that the cleaning and disinfection will be effective up to the projected time the livestock will be loaded. If the livestock are not loaded by the projected time, the APHIS representative will determine whether further cleaning and disinfection are necessary.
(c) The cleaning must remove all garbage, soil, manure, plant materials, insects, paper, and other debris from the stowage area. The disinfectant solution must be applied with a device that creates an aerosol or mist that covers 100 percent of the surfaces in the stowage area, except for any loaded cargo and deck surface under it that, in the opinion of the APHIS representative, do not contain material, such as garbage, soil, manure, plant materials, insects, waste paper, or debris, that may harbor animal disease pathogens.
(d) After cleaning and disinfection is performed, the APHIS representative will sign and deliver to the captain of the aircraft or other responsible official of the airline involved a document stating that the aircraft has been properly cleaned and disinfected, and stating further the date, the carrier, the flight number, and the name of the airport and the city and state in which it is located. If an aircraft is cleaned and disinfected at one airport, then flies to a subsequent airport, with or without stops en route, to load animals for export, an APHIS representative at the subsequent airport will determine, based on examination of the cleaning and disinfection documents, whether the previous cleaning and disinfection is adequate or whether to order a new cleaning and disinfection. If the aircraft has loaded any cargo in addition to animals, the APHIS representative at the subsequent airport will determine whether to order a new cleaning and disinfection, based on both examination of the cleaning and disinfection documents and on the inspection of the stowage area for materials, such as garbage, soil, manure, plant materials, insects, waste paper, or debris, that may harbor animal disease pathogens.
(e) Cargo containers used to ship livestock must be designed and constructed of a material of sufficient strength to securely contain the animals and must provide sufficient space for the species being transported given the duration of the trip, as determined by APHIS.