1. Short title This Act may be cited as the Radiation Exposure Compensation Act Amendments of 2023 . 2. References Except as otherwise specifically provided, whenever in this Act an amendment or repeal is expressed in terms of an amendment to or repeal of a section or other provision of law, the reference shall be considered to be made to a section or other provision of the Radiation Exposure Compensation Act ( Public Law 101–426 ; 42 U.S.C. 2210 note). 3. Extension of fund Section 3(d) is amended— (1) by striking the first sentence and inserting The Fund shall terminate 19 years after the date of the enactment of the Radiation Exposure Compensation Act Amendments of 2023 . ; and (2) by striking 2-year and inserting 19-year . 4. Claims relating to atmospheric testing (a) Leukemia claims relating to Trinity Test in New Mexico and tests at the Nevada site and in the Pacific Section 4(a)(1)(A) is amended— (1) in clause (i)— (A) in subclause (I), by striking October 31, 1958 and inserting November 6, 1962 ; (B) in subclause (II)— (i) by striking in the affected area and inserting in an affected area ; and (ii) by striking or after the semicolon; (C) by redesignating subclause (III) as subclause (V); and (D) by inserting after subclause (II) the following: (III) was physically present in an affected area for a period of at least 1 year during the period beginning on September 24, 1944, and ending on November 6, 1962; (IV) was physically present in an affected area— (aa) for a period of at least 1 year during the period beginning on July 1, 1946, and ending on November 6, 1962; or (bb) for the period beginning on April 25, 1962, and ending on November 6, 1962; or