; and (2) in subsection (l), by striking 2017 and inserting 2019 . 406. Extension of authority for Advisory Committee on Minority Veterans Section 544(e) is amended by striking December 31, 2017 and inserting September 30, 2018 . 407. Extension of authority for temporary expansion of eligibility for specially adapted housing assistance for certain veterans with disabilities causing difficulty ambulating Section 2101(a)(4) is amended— (1) in subparagraph (A), by striking September 30, 2017 and inserting September 30, 2018 ; and (2) in subparagraph (B), by striking 2017 and inserting 2018 . 408. Extension of authority for specially adapted housing assistive technology grant program Section 2108(g) is amended by striking September 30, 2017 and inserting September 30, 2018 . 409. Extension of authority to guarantee payment of principal and interest on certificates or other securities Section 3720(h)(2) is amended by striking December 31, 2017 and inserting September 30, 2018 . 410. Extension of authority to enter into agreement with the National Academy of Sciences regarding associations between diseases and exposure to dioxin and other chemical compounds in herbicides Section 3(i) of the Agent Orange Act of 1991 ( Public Law 102–4 ; 38 U.S.C. 1116 note) is amended by striking December 31, 2017 and inserting September 30, 2018 . 411. Modifications of reductions of reporting fee multipliers (a) Through July 31, 2018 (1) In general Section 412 of the Jeff Miller and Richard Blumenthal Veterans Health Care and Benefits Improvement Act of 2016 ( Public Law 114–315 ; 38 U.S.C. 3684 note) is amended— (A) in subsection (a), by striking September 25, 2017 and inserting July 31, 2018