Many community stations are licensed as full-power FM stations, while others, particularly those founded after 2005, are licensed under low-power broadcasting rules. Many of the former were founded in the 1960s and 1970s when cultural experimentation (such as the New Left) in the U.S. had a significant following, while others were influenced by the philosophy of radio activist Lorenzo Milam. Community radio stations are usually overseen by non-profit organizations, which are led boards of directors and often include paid staff for managing business operations and coordinating volunteers. Community radio programming involving volunteers is also offered as part of student-run stations at colleges, universities and in some cases, high schools.