The ABA, first headquartered in New York City, organized its activities through sections focused on particular bank types. The trust company section was organized in 1896, followed by one for clearing houses in 1899, savings banks in 1902, and state bankers associations in 1908. The ABA's growth continued with the emergence of the Federal Reserve System, which required national banks to be members of a Federal Reserve Bank and provided the option to state-chartered banks. In 1915, the ABA organized a section for national banks and an additional section for state banks in 1916. To facilitate advocacy before the Comptroller of the Currency, the national bank section opened the ABA's first office in Washington, D.C., in 1919. The state bank section also used the Washington office to represent its banks' interest before the Federal Reserve.