; and (ii) a class of craft undergoing a significant incremental change in its existing class (such as a next flight of destroyers or next block of attack submarines). (2) The term future-years defense program has the meaning given that term in section 221 of this title. (3) The term Milestone A approval has the meaning given that term in section 2431a of this title. (b) Clerical amendment The table of sections at the beginning of chapter 863 of such title is amended by inserting after the item relating to section 8669a the following new item: 8669b. Senior Technical Authority for each naval vessel class. . 1018. Permanent authority for sustaining operational readiness of Littoral Combat Ships on extended deployment Section 8680(a)(2) of title 10, United States Code, is amended by striking subparagraph (D). D Counterterrorism 1021. Extension of prohibition on use of funds for transfer or release of individuals detained at United States Naval Station, Guantanamo Bay, Cuba, to the United States Section 1033 of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 ) is amended by striking December 31, 2019 and inserting December 31, 2020 . 1022. Extension of prohibition on use of funds to construct or modify facilities in the United States to house detainees transferred from United States Naval Station, Guantanamo Bay, Cuba Section 1034(a) of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 ) is amended by striking December 31, 2019 and inserting December 31, 2020 . 1023. Extension of prohibition on use of funds for transfer or release of individuals detained at United States Naval Station, Guantanamo Bay, Cuba, to certain countries Section 1035 of the John S. McCain National Defense Authorization Act for Fiscal Year 2018 ( Public Law 115–232 ) is amended by striking December 31, 2019 and inserting December 31, 2020 . 1024. Extension of prohibition on use of funds to close or relinquish control of United States Naval Station,