The Mineral Leasing Act of 1920, as amended [30 U.S.C. 181 et seq.], and the Federal Onshore Oil and Gas Leasing Reform Act of 1987, require the BLM to conduct quarterly, competitive lease sales to offer available oil and gas lease parcels. Expressions of Interest (EOIs) to nominate parcels for leasing by the BLM are submitted by the public. From these EOIs, the BLM prepares the parcels and determines whether or not the existing analyses in the Land Use Plans, as amended, provide basis for leasing oil and gas resources within these parcels, and conducts additional NEPA analysis before determining if parcels are suitable to be offered.