There are authorized to be appropriated—
(a)
such sums, not exceeding $100,000,000, as may be necessary for carrying out the provisions and purposes of this subchapter relating to community facilities and services in critical defense housing areas; and
(b)
such sums, not exceeding $100,000,000, as may be necessary for carrying out the provisions and purposes of this subchapter relating to housing in critical defense housing areas.