; and (B) the rest period is not reduced under any circumstances. (b) Fatigue risk management plan (1) Submission of plan by part 121 air carriers Not later than 90 days after the date of enactment of this Act, each air carrier operating under part 121 of title 14, Code of Federal Regulations (in this section referred to as a part 121 air carrier ), shall submit to the Administrator of the Federal Aviation Administration for review and acceptance a fatigue risk management plan for the carrier’s flight attendants. (2) Contents of plan A fatigue risk management plan submitted by a part 121 air carrier under paragraph (1) shall include the following: (A) Current flight time and duty period limitations. (B) A rest scheme consistent with such limitations that 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. (C) Development and use of a methodology that continually assesses the effectiveness of implementation of the plan, including the ability of the plan— (i) to improve alertness