IIRC, Clinton signed an executive granting environmental groups immunity from suit. Something like that — I bet you know for sure. It came to mind after seeing your comment here about doctor’s being liable. Perhaps something?
Clinton, William Jefferson; Executive Order 12986 dated 1/19/96. URL: http://www.epa.gov/docs/fedrgstr/EPA-GENERAL/1996/January/Day-22/pr-765.html.
Selective indemnification like this is IMO a serious violation of 14th Amendment equal protection.