; (B) a rest scheme that is consistent with such limitations and enables the management of flight attendant fatigue, including annual training to increase awareness of— (i) fatigue; (ii) the effects of fatigue on flight attendants; and (iii) fatigue countermeasures; and (C) the development and use of methodology that continually assesses the effectiveness of implementation of the plan, including the ability of the plan— (i) to improve alertness; and (ii) to mitigate performance errors. (3) Review Not later than 1 year after the date of enactment of this Act, the Administrator shall— (A) review each fatigue risk management plan submitted under this subsection; and (B) (i) accept the plan; or (ii) reject the plan and provide the part 121 air carrier with suggested modifications to be included when the plan is resubmitted. (4) Plan updates (A) In general Not less frequently than once every 2 years, each part 121 air carrier shall— (i) update the fatigue risk management plan submitted under paragraph (1); and (ii) submit the updated plan to the Administrator for review and acceptance. (B) Review Not later than 1 year after the date on which an updated plan is submitted under subparagraph (A)(ii), the Administrator shall— (i) review the updated plan; and (ii) (I) accept the updated plan