Amounts made available by section 20101(d)(2) of this title for the purposes of this section shall be obligated and expended by the Secretary of Health and Human Services for grants under section 5106c 1

of title 42. Any portion of an amount which is not obligated by the Secretary by the end of the fiscal year in which funds are made available for allocation, shall be reallocated for award under section 20103(a) of this title, except that with respect to funds deposited during fiscal year 1986 and made available for obligation during fiscal year 1987, any unobligated portion of such amount shall remain available for obligation until September 30, 1988.