Revitalization of the AM Radio Service

This document amends certain Commission rules applying to AM broadcast stations using directional antenna arrays. AM directional antenna arrays are multiple-tower installations designed to direct radio energy primarily in certain directions in order to avoid interfering with other AM broadcast stations. Approximately 40 percent of all AM broadcasters use directional arrays during some part of the broadcast day. These rule amendments are intended to decrease the burdens and expense of installing and maintaining directional arrays, especially for AM broadcasters using Method of Moments (MoM) modeling for proofs of performance of their directional arrays.