It is the intent of the Legislature that funds authorized pursuant to this chapter replace, as of July 1, 1979, funds previously authorized to support educationally disadvantaged youth programs and bilingual education. To that end, the purpose of this article is to provide a method of impact aid allocation to be utilized by the Superintendent, that will allow efforts initiated under those programs to continue and expand so long as a need exists while previously unserved and underserved populations are provided with adequate aid.