"Don't ask, don't tell" (DADT) was the official United States policy on service by gays, bisexuals, and lesbians in the military instituted by the Clinton Administration on February 28, 1994, when Department of Defense Directive 1304.26 issued on December 21, 1993, took effect, lasting until September 20, 2011. The policy prohibited military personnel from discriminating against or harassing closeted homosexual or bisexual service members or applicants, while barring openly gay, lesbian, or bisexual persons from military service. This relaxation of legal restrictions on service by gays and lesbians in the armed forces was mandated by United States federal law , which was signed November 30, 1993. The policy prohibited people who "demonstrate a propensity or intent to engage in homosexual acts" from serving in the armed forces of the United States, because their presence "would create an unacceptable risk to the high standards of morale, good order and discipline, and unit cohesion that are the essence of military capability".