Declaration of a National Emergency with respect to the 2009 H1N1 Influenza Pandemic, White House, October 24, 2009 [granting Department of Health and Human Services Secretary Kathleen Sebelius authority under section 1135 of the Social Security Act to allow medical providers to bypass federal regulations when it comes to treating large numbers of infected people].
Reported in JURIST's Paper Chase here. Latest commentary available here.