The Save the Theatres campaign then turned their efforts toward supporting the establishment of the Theater District as a registered New York City historic district. In December 1983, Save the Theatres prepared "The Broadway Theater District, a Preservation Development and Management Plan," and demanded that each theater in the district receive landmark designation. Mayor Koch ultimately responded by creating a Theater Advisory Council, that included Papp as a member, and which eventually led to the area being officially zoned as the "Theater Subdistrict."