Proration rule

If, after the application of this subsection without regard to this paragraph, the sum of the allotments determined under paragraph (1), (2), (3), (4), (10), or (11) for a fiscal year (or, in the case of fiscal year 2015, 2017, 2023, or 2029, for a semi-annual period in such fiscal year) exceeds the amount available under subsection (a) for such fiscal year or period, the Secretary shall reduce each allotment for any State under such paragraph for such fiscal year or period on a proportional basis.