Presidential attempts to remove independent agency officials have generated most of the important Supreme Court legal opinions in this area. In 1935, the Supreme Court in the case of "Humphrey's Executor v. United States" decided that although the president had the power to remove officials from agencies that were "an arm or an eye of the executive", it upheld statutory limitations on the president's power to remove officers of administrative bodies that performed quasi legislative or quasi judicial functions, such as the Federal Trade Commission. Presidents normally do have the authority to remove regular executive agency heads at will, but they must meet the statutory requirements for removal of commissioners of independent agencies, such as demonstrating incapacity, neglect of duty, malfeasance, or other good cause.