; (2) provides the ability to securely communicate classified information in a jamming environment of like-echelon forces; and (3) utilizes a waveform that is made available in the Department of Defense Waveform Information Repository. (b) Waiver The Secretary of a military department may waive the requirement under subsection (a) with respect to a communications system upon certifying to the congressional defense committees that the system will not require resiliency due to its expected use. 152. F–35 sustainment cost (a) Quarterly report The Under Secretary of Defense for Acquisition and Sustainment shall include in the quarterly report required under section 155 of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 )— (1) sustainment cost data related to the F–35 program, including a comparison in itemized format of the cost of legacy aircraft and the cost of the F–35 program, based on a standardized set of criteria