The Congress declares that the general welfare and security of the Nation and the health and living standards of its people require housing production and related community development sufficient to remedy the serious housing shortage, the elimination of substandard and other inadequate housing through the clearance of slums and blighted areas, and the realization as soon as feasible of the goal of a decent home and a suitable living environment for every American family, thus contributing to the development and redevelopment of communities and to the advancement of the growth, wealth, and security of the Nation. The Congress further declares that such production is necessary to enable the housing industry to make its full contribution toward an economy of maximum employment, production, and purchasing power. The policy to be followed in attaining the national housing objective established shall be: (1) private enterprise shall be encouraged to serve as large a part of the total need as it can; (2) governmental assistance shall be utilized where feasible to enable private enterprise to serve more of the total need; (3) appropriate local public bodies shall be encouraged and assisted to undertake positive programs of encouraging and assisting the development of well-planned, integrated residential neighborhoods, the development and redevelopment of communities, and the production, at lower costs, of housing of sound standards of design, construction, livability, and size for adequate family life; (4) governmental assistance to eliminate substandard and other inadequate housing through the clearance of slums and blighted areas, to facilitate community development and redevelopment, and to provide adequate housing for urban and rural nonfarm families with incomes so low that they are not being decently housed in new or existing housing shall be extended to those localities which estimate their own needs and demonstrate that these needs are not being met through reliance solely upon private enterprise, and without such aid; and (5) governmental assistance for decent, safe, and sanitary farm dwellings and related facilities shall be extended where the farm owner demonstrates that he lacks sufficient resources to provide such housing on his own account and is unable to secure necessary credit for such housing from other sources on terms and conditions which he could reasonably be expected to fulfill. The Department of Housing and Urban Development, and any other departments or agencies of the Federal Government having powers, functions, or duties with respect to housing, shall exercise their powers, functions, and duties under this or any other law, consistently with the national housing policy declared by this Act and in such manner as will facilitate sustained progress in attaining the national housing objective hereby established, and in such manner as will encourage and assist (1) the production of housing of sound standards of design, construction, livability, and size for adequate family life; (2) the reduction of the costs of housing without sacrifice of such sound standards; (3) the use of new designs, materials, techniques, and methods in residential construction, the use of standardized dimensions and methods of assembly of home-building materials and equipment, and the increase of efficiency in residential construction and maintenance; (4) the development of well-planned, integrated, residential neighborhoods and the development and redevelopment of communities; and (5) the stabilization of the housing industry at a high annual volume of residential construction.