The principles and guidelines for city development were contained in various manuals and handbooks. London County Council Architect's Department produced a number of manuals of its own, pertaining to planning, building controls, traffic congestion and internal protocols. Meanwhile the Ministry of Town and Country Planning produced important guidelines, such as its Handbook, The Redevelopment of Central Areas (1947) , which outlined the correct sequence of survey and development and the rules of development, in terms of daylighting control and plot ratio. Circulars were produced by Her Majesty's Stationary Office relating to both the Town and Country Planning Act, 1947 and Town and Country Planning Act, 1959, which were circulated around the London County Council's Architect's Department.