The legal challenge Buckley v. Valeo resulted in a landmark 1976 U.S. Supreme Court decision on campaign finance law that upheld the Federal Election Campaign Act’s financial disclosure requirements, contribution limits and provision for public funding of presidential election campaigns. The court struck down spending limits in the law, except for the limits accepted voluntarily by presidential candidates who receive public funds. Thus, the ruling allowed for unlimited spending by congressional candidates (they do not receive public funds) and by persons or groups who campaign for or against a candidate, but who do not coordinate their activities with any candidate or campaign. The ruling also said that candidates who do not receive public money do not have to limit campaign spending of their own personal funds. See also McCain-Feingold.