; and (B) in subsection (b)— (i) in the first sentence, by striking he and inserting the miner ; (ii) in the third sentence, by striking he and inserting the Secretary ; (iii) in the ninth sentence— (I) by striking he each place it appears and inserting the Secretary ; and (II) by striking his and inserting the miner’s ; and (iv) in the tenth sentence, by striking he each place it appears and inserting the Secretary ; and (13) in section 430 ( 30 U.S.C. 940 )— (A) by striking 1977 and and inserting 1977, ; and (B) by striking 1981 and inserting 1981, and the Black Lung Benefits Improvement Act of 2023 , and any amendments made after the date of enactment of such Act, . 302. Severability If any provision of this Act or any amendment made by this Act, or the application of a provision of this Act or an amendment made by this Act to any person or circumstance, is held to be unconstitutional, the remainder of this Act and the amendments made by this Act, and the application of the provisions or amendment to any other person or circumstance, shall not be affected by the holding.