280F Section 168(k)(2)(F) is amended— (1) by striking $8,000 in clauses (i) and (iii) and inserting $16,000 , and (2) in clause (iii)— (A) by striking placed in service by the taxpayer after December 31, 2017 and inserting acquired by the taxpayer before September 28, 2017, and placed in service by the taxpayer after September 27, 2017 , and (B) by redesignating subclauses (I) and (II) as subclauses (II) and (III) respectively, and inserting before clause (II), as so redesignated, the following new subclause: (I) in the case of a passenger automobile placed in service before January 1, 2018, $8,000 , . (f) Conforming amendments (1) Section 168(k)(2)(B)(i)(III), as amended, is amended by inserting binding before contract . (2) Section 168(k)(5) is amended by— (A) by striking January 1, 2020 in subparagraph (A) and inserting January 1, 2023 , (B) by striking 50 percent in subparagraph (A)(i) and inserting 100 percent , and (C) by striking subparagraph (F). (3) Section 168(k)(6) is amended to read as follows: (6) Phase Down In the case of qualified property acquired by the taxpayer before September 28, 2017, and placed in service by the taxpayer after September 27, 2017, paragraph (1)(A) shall be applied by substituting for 100 percent — (A) 50 percent in the case of— (i) property placed in service before January 1, 2018, and (ii) property described in subparagraph (B) or (C) of paragraph (2) which is placed in service in 2018, (B) 40 percent in the case of— (i) property placed in service in 2018 (other than property described in subparagraph (B) or (C) of paragraph (2)), and (ii) property described in subparagraph (B) or (C) of paragraph (2) which is placed in service in 2019, and (C) 30 percent in the case of— (i) property placed in service in 2019 (other than property described in subparagraph (B) or (C) of paragraph (2)), and (ii) property described in subparagraph (B) or (C) of paragraph (2) which is placed in service in 2020. . (4) The heading of section 168(k) is amended by striking Special allowance for