The ANCs' main job is to be their neighborhood's official voice in advising the District government (and Federal agencies) on things that affect their neighborhoods. Although they are not required to follow the ANCs' advice, District agencies are required to give the ANCs' recommendations "great weight." Moreover, District law says that agencies cannot take any action that will significantly affect a neighborhood unless they give the affected ANCs 30 days advance notice. This includes zoning, streets, recreation, education, social services, sanitation, planning, safety, budget, and health services.