; (B) such change shall be treated as made with the consent of the Secretary of the Treasury; and (C) the net amount of the adjustments required to be taken into account by the taxpayer under section 481 of the Internal Revenue Code of 1986 shall be taken into account ratably over a period (not greater than 8 taxable years) beginning with such first taxable year. 4. Eligibility for new leases and the transfer of leases (a) Definitions In this section: (1) Covered lease The term covered lease means a lease for oil or gas production in the Gulf of Mexico that is— (A) in existence on the date of enactment of this Act; (B) issued by the Department of the Interior under section 304 of the Outer Continental Shelf Deep Water Royalty Relief Act ( 43 U.S.C. 1337 note; Public Law 104–58 )