Health centers are private, nonprofit community-based organizations or, less commonly, public organizations such as public health department clinics. Section 330 of the Public Health Service Act, which authorizes the Health Center Program, requires health centers to provide a comprehensive set of primary health care services, including enabling services-such as language translation and transportation-that facilitate access to health care. Among other things, health centers are also required to have a sliding fee scale based on a patient's ability to pay and to be governed by a community board of which at least 51 percent of the members are patients of the health center.