Beginning July 1, 2008, and thereafter, any funds (including investments and interest earned, except for construction funds) held by a Public Law 100–297 grant or a Public Law 93–638 contract school shall, upon retrocession to or re-assumption by the Bureau of Indian Education, remain available to the Bureau of Indian Education for a period of 5 years from the date of retrocession or re-assumption for the benefit of the programs approved for the school on October 1, 1995.