The Davis Amendment was a provision attached to the March 28, 1928 reauthorization of the Radio Act of 1927, which mandated an "equality of radio broadcasting service" within the United States. It specified an "equitable allocation" among five regional zones, in addition to assignments proportional to population among the states within each zone. Its implementation resulted in the development of a complicated quota system by the Federal Radio Commission, and although its provisions were carried over to the Federal Communications Commission by the Communications Act of 1934, it ultimately proved impractical, and was repealed on June 5, 1936.