Effective November 11, 1928, the Federal Radio Commission implemented a major reassignment of transmitting frequencies, as outlined by its General Order 40 Band Plan. Following standards set by the Davis Amendment, each of five regions was assigned eight "clear channel" frequencies. Under this plan WGY remained on 790 kHz, however, this frequency was now designated for primary use in the westernmost region, where it was assigned to KGO in Oakland, California. General Electric sought to have WGY given its own clear channel assignment, but was unsuccessful. KGO was also owned by General Electric, so the company ultimately transferred the 790 kHz clear channel status from KGO to WGY by reducing KGO's power. KGO began operating at 7,500 watts, which was lower than the minimum 10,000 watts permissible for a clear channel station. (The Davis Amendment was repealed in 1936. In 1947, KGO's power was increased to 50,000 watts, through the use of a directional antenna that limited its signal toward WGY).