Subsequently, political parties and "watchdog" organizations have filed complaints with the FEC concerning the raising and spending of soft money by so-called "527 organizations"—organizations claiming tax-exemption as "political organizations" under Section 527 of the Internal Revenue Code (), but not registering as "political committees" under the Federal Election Campaign Act, which uses a different legal definition. These organizations have been established on both sides of the political aisle, and have included high-profile organizations such as the Media Fund and the Swift Boat Veterans for Truth. 527s are financed in large part by wealthy individuals, labor unions, and businesses. 527s pre-dated McCain–Feingold but grew in popularity after the law took effect. In May 2004, the FEC voted to not write new rules on the application of federal campaign finance laws to 527 organizations. Although the FEC did promulgate a new rule in the fall of 2004 requiring some 527s participating in federal campaigns to use at least 50% "hard money" (contributions regulated by the Federal Election Campaign Act) to pay their expenses, the FEC did not change its regulations on when a 527 organization must register as a federal "political committee"-prompting Representatives Shays and Meehan to file a federal court lawsuit against the FEC for the Commission's failure to adopt a 527 rule. In September, 2007, a Federal District Court ruled in favor of the FEC, against congressmen Shays and Meehan.