; (2) the recommendations of the Committee under subsection (b); and (3) the Administrator's plan, if any, to implement such recommendations. (d) Rulemaking Not later than 90 days after submitting the report to Congress under subsection (c), the Administrator shall issue a notice of proposed rulemaking to implement the recommendations of the Committee that the Administrator deems appropriate. 733. Improved training standards for assisting passengers who use wheelchairs (a) Rulemaking The Secretary shall conduct a rulemaking to develop requirements for minimum training standards for airline personnel or contractors who assist wheelchair users who must board or deplane using an aisle chair or other boarding device. (b) Requirements The training standards developed under subsection (a) shall require, at a minimum, that airline personnel or contractors— (1) complete refresher training every 6 months and be recertified yearly on the job by a superior in order to remain qualified for providing aisle chair assistance