; 132 Stat. 1722)) site; and (II) pre-application activities relating to an early site permit (as defined in section 52.1 of title 10, Code of Federal Regulations (or a successor regulation)) to demonstrate an advanced nuclear reactor on a Department of Energy site or critical national security infrastructure (as defined in section 327(d) of the John S. McCain National Defense Authorization Act for Fiscal Year 2019 ( Public Law 115–232 ; 132 Stat. 1722)) site. . (2) Effective date The amendment made by paragraph (1) shall take effect on October 1, 2024. (j) Clarification on fusion regulation Section 103(a)(4) of the Nuclear Energy Innovation and Modernization Act ( 42 U.S.C. 2133 note; Public Law 115–439 ) is amended— (1) by striking Not later and inserting the following: (A) In general Not later