71 FR 40503
There are multiple articles on volume 71, page 40503. Which article are you looking for?
Hyrum City; Notice of Scoping Meetings and Site Visit and Soliciting Scoping Comments
Pages 40502 - 40503
A Notice by the Federal Energy Regulatory Commission
Parker-Davis Project-Post-2008 Resource Pool
Pages 40503 - 40506
A Notice by the Western Area Power Administration