; (ii) an assessment of the evacuation testing procedures described in section 25.803 of such title 14, as well as recommendations for how to revise such testing procedures to ensure that the testing procedures assess, in a safe manner, the ability of passengers with disabilities, including those who use wheelchairs or other mobility assistive devices, to safely and efficiently evacuate an aircraft; (iii) an assessment of the evacuation demonstration procedures described in such part 121, as well as recommendations for how to improve such demonstration procedures to ensure that the demonstration procedures assess, in a safe manner, the ability of passengers with disabilities, including those who use wheelchairs or other mobility assistive devices, to safely to efficiently evacuate an aircraft; (iv) the research proposed in National Transportation Safety Board Safety Recommendation A-18-009