What was the name of the legislation that was passed that allows unions to financially support campaigns?

This is a fairly recent legislation, but I cannot remember nor find a name for it. Even any common tags associated with it would help; I'm fully able to do my own research once I know what to put into the search bar. [Unlike others on Yahoo Answers.] This legislation had a lot of media surrounding it. It was passed and now allows unions to support political campaigns as long as the financial information is recorded and available to the public.|||Citizens United v. Federal Election Commission





The Court's Opinion:


http://www.supremecourt.gov/opinions/09p鈥?/a>|||http://www.fec.gov/law/cfr/ej_compilatio鈥?/a>





http://www.fec.gov/