; and (2) a progress report on the extent to which the goals developed pursuant to subsection (b) are being achieved. (b) Cost reduction plan (1) In general The Under Secretary of Defense for Acquisition and Sustainment shall develop a plan for achieving significant reductions in the cost to operate and maintain the F–35 aircraft. (2) Elements The plan required under paragraph (1) shall include the following elements: (A) Specific changes in the management of operation and support (O&S) cost to engender continuous process improvement. (B) Specific actions the Department will implement in the near term to reduce O&S cost. (C) Concrete timelines for implementing the specific actions and process changes. (3) Report Not later than 180 days after the date of the enactment of this Act, the Under Secretary shall submit to the congressional defense committees a report on the baseline plan for achieving operation and support cost savings. 153. Economic order quantity contracting authority for F–35 Joint Strike Fighter program The Secretary of Defense is authorized to award multiyear contracts for the procurement of F–35 aircraft in economic order quantities for fiscal year 2021 (Lot 15) through fiscal year 2023 (Lot 17). 154. Repeal of tactical unmanned vehicle common data link requirement Section 141 of the National Defense Authorization Act for Fiscal Year 2006 ( Public Law 109–163