made by this section shall apply to property placed in service after December 31, 2017, in taxable years ending after such date. 315. Reduction in amortization period for intangibles (a) In general Section 197(a) is amended by adding at the end the following new sentence: In the case of such an intangible acquired after the date of the enactment of the INVEST Act of 2017 , the preceding sentence shall be applied by substituting 10-year period for 15-year period . . (b) Application of anti-Churning rules Section 197(f)(9) is amended by adding at the end the following: (G) Application to INVEST Act changes If subparagraph (A) or (F) would apply to any section 197 intangible if— (i) the date of the enactment of the INVEST Act of 2017 were substituted for the date of the enactment of this section each place it appears in each such subparagraph, and (ii) May 17, 2017 were substituted for July 25, 1991 each place it appears in subparagraph (A), then the last sentence of subsection (a) (relating to 10-year amortization) shall not apply to the transferee of such intangible. . (c) Conforming amendment Section 197(e)(4)(D)(i) is amended by inserting (10 years in the case of a right acquired after the date of the enactment of the INVEST Act of 2017 ) after 15 years . (d) Effective date The amendments made by this section apply to acquisitions after the date of the enactment of this Act in taxable years ending after such date.