1. Short title This Act may be cited as the Domestic Offshore Energy Reinvestment Act of 2018 . 2. Amendments to the Gulf of Mexico Energy Security Act of 2006 (a) In general Section 105(a) of the Gulf of Mexico Energy Security Act of 2006 ( 43 U.S.C. 1331 note) is amended— (1) in paragraph (1), by striking 50 and inserting 37.5 ; and (2) in paragraph (2)— (A) in the matter preceding subparagraph (A), by striking 50 and inserting 62.5 ; (B) in subparagraph (A), by striking 75 and inserting 80 ; and (C) in subparagraph (B), by striking 25 and inserting 20 . (b) limitations on authorized uses Section 105(d) of the Gulf of Mexico Energy Security Act of 2006 ( 43 U.S.C. 1331 note) is amended— (1) in paragraph (1), by adding at the end the following: (F) Planning, engineering, design, construction, operations, and maintenance of one or more projects that are specifically authorized by any other Act for ecosystem restoration, hurricane protection, or flood damage prevention. ; and (2) by striking paragraph (2) and inserting the following: (2) Limitation Of the amounts received by a Gulf producing State or coastal political subdivision under subsection (b)— (A) not more than 3 percent may be used for the purposes described in paragraph (1)(E); and (B) not less than 25 percent may be used for the purposes described in paragraph (1)(F), and shall be applied proportionally to the applicable Federal and non-Federal share pursuant to such specific project authorization. . (c) Repeal of limitation Section 105(f) of the Gulf of Mexico Energy Security Act of 2006 ( 43 U.S.C. 1331 note) is amended— (1) by striking paragraph (1); and (2) redesignating paragraphs (2) and (3) as paragraphs (1) and (2), respectively.