; and (2) in any pre-flight notifications or communications provided to passengers who alert the air carrier in advance of the need for accommodations relating to a disability. (e) Training The Secretary shall ensure that employees of air carriers and their contractors receive training on the Airline Passengers with Disabilities Bill of Rights. 9. Study on in-cabin wheelchair restraint systems (a) In general Not later than 2 years after the date of the enactment of this Act, the Access Board, in consultation with the Secretary, shall— (1) conduct a study to determine the ways in which individuals with significant disabilities who use wheelchairs, including power wheelchairs, can be accommodated onboard aircraft through in-cabin wheelchair restraint systems; (2) issue minimum guidelines for such systems