Airport policing in the United Kingdom has taken many forms since the rise of scheduled airline services in the post-war period. Policing at major civilian airports was the responsibility of specialist constabularies operated by three central government departments until 1974, when the rise in international terrorism saw armed police from territorial police forces deployed to major airports under the provisions of the Policing of Airports Act. As more minor airports grew in size, they too switched to armed police provided by local police forces. However, the funding agreements for the provision of such services varied wildly from airport to airport, leading to disagreements between airport operators and chief constables. A new regime, the Airport Security Planning Framework, came into force in January 2010, and brought airport operators, airlines and police forces together to develop joint security and policing plans for all passenger airports.