Executive Order 13087 was signed by U.S. President Bill Clinton on May 28, 1998, amending Executive Order 11478 to prohibit discrimination based on sexual orientation in the competitive service of the federal civilian workforce. The order also applies to employees of the government of the District of Columbia, and the United States Postal Service. However, it does not apply to positions and agencies in the excepted service, such as the Central Intelligence Agency, National Security Agency, and the Federal Bureau of Investigation.