; and (B) by inserting in the fiscal year concerned after may be used ; and (2) in subsection (c), by inserting with respect to funds for a fiscal year after the limitation in subsection (a) . 1242. Extension of limitation on availability of funds relating to activities to recognize the sovereignty of the Russian Federation over Crimea Section 1234 of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ) is amended— (1) in subsection (a), by inserting or 2018 after fiscal year 2017 ; and (2) in subsection (b), by inserting for a fiscal year after expenditure of funds . 1243. Extension of Ukraine Security Assistance Initiative (a) Extension Subsection (h) of section 1250 of the National Defense Authorization Act for Fiscal Year 2016 ( Public Law 114–92 ; 129 Stat. 1068), as amended by section 1237 of the National Defense Authorization Act for Fiscal Year 2017 ( Public Law 114–328 ; 130 Stat. 2494), is further amended by striking December 31, 2018 and inserting December 31, 2019 . (b) Funding for fiscal year 2018 Subsection (f) of such section 1250, as added by subsection (a) of such section 1237, is further amended by adding at the end the following new paragraph: (3) For fiscal year 2018, $500,000,000. . (c) Availability of funds Subsection (c) of such section 1250, as amended by subsection (c) of such section 1237, is further amended— (1) in paragraph (1), by inserting after pursuant to subsection (f)(2) the following: , or more than $250,000,000 of the funds available for fiscal year 2018 pursuant to subsection (f)(3), ; (2) in paragraph (2), by inserting with respect to the fiscal year concerned after is a certification ; and (3) in paragraph (3)— (A) by inserting or 2018 after in fiscal year 2017