Northwest Public Power Association (NWPPA) Bulletin, Jul. 2014, by Richard Lorenz. (Scroll to page 18.)
http://www.nwppa.org/External/WCPages/WCWebContent/WebContentPage.aspx?ContentID=1805

"There may be a misconception in our region that PURPA (Public Utility Regulatory Policies Act) only applies to investor-owned electric utilities that are subject to the jurisdiction of the Federal Energy Regulatory Commission (FERC). However, this is not the case."