527 Group – A tax-exempt group organized under section 527 of the Internal Revenue Code to raise money for political activities including voter mobilization efforts, issue advocacy and the like. Currently, the FEC only requires a 527 group to file regular disclosure reports if it is a political party or political action committee (PAC) that engages in either activities expressly advocating the election or defeat of a federal candidate, or in electioneering communications. Otherwise, it must file either with the government of the state in which it is located or the Internal Revenue Service. Many 527s run by special interest groups raise unlimited "soft money," which they use for voter mobilization and certain types of issue advocacy, but not for efforts that expressly advocate the election or defeat of a federal candidate or amount to electioneering communications.