; and (2) complete refresher training within 18 months of an initial training and be recertified on the job every 18 months thereafter by a relevant superior in order to remain qualified for handling and stowing wheelchairs and scooters. (c) Considerations In conducting the rulemaking under subsection (a), the Secretary shall consider, at a minimum, whether to require air carriers and foreign air carriers to partner with wheelchair or scooter manufacturers, national disability and disabled veterans organizations representing individuals who use wheelchairs and scooters, and aircraft manufacturers, in developing, administering, and auditing training. (d) Final rule Not later than 12 months after the date of enactment of this Act, the Secretary shall issue a final rule pursuant to the rulemaking conducted under this section. (e) Penalties The Secretary may assess a civil penalty in accordance with section 46301 of title 49, United States Code, to any air carrier or foreign air carrier who fails to meet the requirements established under the final rule under subsection (d). 544. Mobility aids on board improve lives and empower all (a) Publication of cargo hold dimensions (1) In general Not later than 2 years after the date of enactment of this Act, the Secretary shall require air carriers to publish in a prominent and easily accessible place on the public website of the air carrier, information describing the relevant dimensions and other characteristics of the cargo holds of all aircraft types operated by the air carrier, including the dimensions of the cargo hold entry, that would limit the size, weight, and allowable type of cargo. (2) Proprietary information The Secretary shall allow an air carrier to protect the confidentiality of any trade secret or proprietary information submitted in accordance with paragraph (1), as appropriate. (b) Refund required for individual traveling with wheelchair In the case of a qualified individual with a disability traveling with a wheelchair who has purchased a ticket for a