(a) Authorization of appropriations Except as provided in subsection (b) of this section, there are authorized to be appropriated
(1) an amount not to exceed 5 percent of the sum of
(A) the sums received by the Secretary from sales of timber and other products of the forests; and
(B) user fees paid in connection with the use of forest lands; and
(2) such additional sums as may be necessary to carry out the purposes of this subchapter.
(c) Spending authority Any spending authority (as defined in section
651 of title
2) provided in this subchapter shall be effective for any fiscal year only to such extent or in such amounts as are provided in appropriation Acts.