ONLINE PROTECTION: The 1998 law imposes a $50,000 fine and six-month prison term on commercial Web sites that publish content “harmful to children.” The U.S. Supreme Court has twice upheld injunctions that block enforcement.

CIVIL LIBERTIES SUIT: Challenges the law on free-speech grounds. It argues the act is overly broad and recommends Internet filters instead.

WHAT’S NEXT: Trial over lawsuit set for Oct. 2. Google, meanwhile, has been fighting a related Justice Department subpoena for sample query and database information.