programs and activities for which funds allocated to establish the programs were available, prior to such allocation, until the end of the fiscal year in which the reimbursement occurs, notwithstanding any otherwise applicable limits on amounts for such program or activities for a fiscal year. (3) Authorization of appropriations For each of fiscal years 2018 through 2024, there are authorized to be appropriated for fees under this section $20,600,000, as adjusted by subsection (d). (4) Offset of overcollections