The powers conferred by this chapter shall be exercised by the Secretary of Housing and Urban Development (hereinafter referred to as the “Secretary”). In order to carry out the provisions of this subchapter and subchapters II, III, V, VI, VII, VIII, IX–B, and X, the Secretary may establish such agencies, accept and utilize such voluntary and uncompensated services, utilize such Federal officers and employees, and, with the consent of the State, such State and local officers and employees, and appoint such other officers and employees as he may find necessary, and may prescribe their authorities, duties, responsibilities, and tenure and fix their compensation. The Secretary may delegate any of the functions and powers conferred upon him under this subchapter and subchapters II, III, V, VI, VII, VIII, IX–B, and X to such officers, agents, and employees as he may designate or appoint, and may make such expenditures (including expenditures for personal services and rent at the seat of government and elsewhere, for law books and books of reference, and for paper, printing, and binding) as are necessary to carry out the provisions of this subchapter and subchapters II, III, V, VI, VII, VIII, IX–B, and X, without regard to any other provisions of law governing the expenditure of public funds. All such compensation, expenses, and allowances shall be paid out of funds made available by this chapter: Provided, That notwithstanding any other provisions of law except provisions of law hereafter enacted expressly in limitation hereof, all expenses of the Department of Housing and Urban Development in connection with the examination and insurance of loans or investments under any subchapter of this chapter all properly capitalized expenditures, and other necessary expenses not attributable to general overhead in accordance with generally accepted accounting principles shall be consider