The purpose of this document is to inform the public that, on June 3, 1999, EPA updated its delegation of authority to the State of Wyoming for implementation and enforcement of the Federal new source performance standards (NSPS) as in effect on July 1, 1997. EPA granted delegation in response to a May 21, 1999 request from the Governor of Wyoming. EPA is also updating the table in 40 CFR part 60 regarding the NSPS delegation status for EPA Region VIII States, and EPA is updating the Region VIII address listed in 40 CFR part 60.