2017 ( Public Law 114–328 ), as amended by section 127 of the National Defense Authorization Act for Fiscal Year 2018 ( Public Law 115–91 ), is further amended by striking or fiscal year 2018 and inserting , fiscal year 2018, or fiscal year 2019 . 124. Prohibition on availability of funds for Navy port waterborne security barriers (a) Prohibition Except as provided under subsection (b), none of the funds authorized to be appropriated by this Act or otherwise made available for the Department of Defense for fiscal year 2019 may be used for the procurement of new Navy port waterborne security barriers. (b) Waiver The Secretary of the Navy may waive the prohibition under subsection (a) not less than 30 days after submitting to the congressional defense committees— (1) a Navy requirements document that specifies Key Performance Parameters and Key System Attributes for new Navy port waterborne security barriers