Almost all U.S. offshore oil and gas production occurs in the Gulf of Mexico. Federal oil and gas leasing in the Gulf is governed primarily by two laws-the Outer Continental Shelf Lands Act (OCSLA; 43 U.S.C. §§1331-1356b), which broadly controls oil and gas leasing throughout the U.S. outer continental shelf (OCS); and the Gulf of Mexico Energy Security Act of 2006 (GOMESA; 43 U.S.C. §1331 note), whose provisions relate specifically to leasing in the Gulf region. GOMESA imposes an oil and gas leasing moratorium through June 30, 2022, in most of the Eastern Gulf (off the Florida coast) and a small part of the Central Gulf. The law also establishes a framework for sharing revenues from certain qualified oil and gas leases in other parts of the Gulf with the "Gulf producing states" of Alabama, Louisiana, Mississippi, and Texas, as well as with a nationwide outdoor recreation program-the state assistance program established by the Land and Water Conservation Fund Act (LWCF; 54 U.S.C. §§200301 et seq.). The 116th Congress is considering changes to GOMESA, as statutory provisions related to both the moratorium and revenue sharing enter a period of transition. GOMESA Moratorium GOMESA's leasing moratorium is scheduled to expire in June 2022, and the Department of the Interior's (DOI's) Bureau of Ocean Energy Management (BOEM) has begun to plan for offshore leasing in the moratorium area after the expiration. Some Members of Congress seek to forestall new lease sales in the area by extending the moratorium; others support allowing it to expire on the scheduled date. On September 11, 2019, the House passed H.R. 205, which would make the GOMESA moratorium permanent. Some other 116th Congress bills (e.g., H.R. 286, H.R. 291, H.R. 341, H.R. 2352, H.R. 3585, and S. 13) also would extend the moratorium or make it permanent. By contrast, H.R. 4294 would mandate lease sales in the area directly following the expiration. Absent congressional action, the executive branch is to decide whether to offer new oil and gas leases in the GOMESA moratorium area after June 2022. The Trump Administration has indicated interest in pursuing oil and gas leasing in that area after the expiration and has included two lease sales in a preliminary draft of its offshore leasing program for 2019-2024. In addition to economic, budgetary, and environmental considerations in extending or ending the moratorium, a particular issue is potential conflict related to the Department of Defense's (DOD's) intensive use of the area for military testing and training. DOD generally has supported the moratorium and has indicated that, from a defense standpoint, stipulations and restrictions on oil and gas activities would be necessary if the area were to be opened to leasing in 2022. GOMESA Revenue Sharing A second revenue-sharing phase (referred to as "Phase II") has begun under GOMESA. Compared with GOMESA's first decade (FY2007-FY2016), Phase II requires revenues to be shared from an expanded set of leases. Revenues continue to be shared at a rate of 37.5% with the Gulf producing states and their coastal political subdivisions, and at a rate of 12.5% with the LWCF state assistance program. The remaining 50% of qualified revenues are deposited in the General Fund of the U.S. Treasury as miscellaneous receipts. Revenue sharing from the added Phase II areas is capped annually at $500 million for most years through FY2055 for the four states and LWCF combined. Stakeholders have debated whether the Phase II revenue-sharing provisions should remain in place or whether different proportions should be shared with coastal states, used for broader federal programs, or deposited as miscellaneous receipts to the U.S. Treasury. Some Members of Congress seek to increase revenues shared with the Gulf Coast states, for example, by raising or eliminating GOMESA's revenue-sharing cap, increasing the state-shared percentage, or both.