ssistant Secretary of Land and Minerals Management, C. Stephen Allred signed agreements with BP, ConocoPhillips, Marathon Oil Company, Shell, and Walter Oil and Gas Corporation, addressing deepwater Gulf of Mexico offshore oil and gas leases issued in 1998 and 1999. Under the agreements these companies will pay royalties on oil and gas produced under leases issued in 1998-1999. Revenue will be received for products starting from October 1, 2006 onward. Deepwater leases issued during this time included a royalty incentive to encourage companies to explore for oil and gas in areas where the costs to explore and produce were high. The incentive allowed companies to produce a set volume of oil and gas before they would begin paying royalties.