Annually before the first day of May, 1961, and the first day of February of each year thereafter, every intermediate unit planning to conduct summer classes or schools for children of migrant laborers, and the extension of established summer classes beyond the opening of the fall term, such extensions being for not more than forty school days, shall submit for prior review and approval by the Department of Public Instruction¹ an estimate of the cost of summer classes or schools for children of migrant laborers to be operated by the intermediate unit during the ensuing school year and for transportation, in conformity with existing law, of pupils to and from summer classes and schools for children of migrant laborers whether conducted by the intermediate unit or conducted by an institution or school district employed by the intermediate unit for such purpose: Provided, That where in the judgment of the State Superintendent of Public Instruction the provisions of this act relating to the proper education of children of migrant laborers have not been complied with, the Department of Public Instruction may provide or arrange to have provided transportation, classes or schools for the proper education of children of migrant laborers as directed by the act.

On or before the first day of July, the Commonwealth shall pay to the intermediate unit a sum equal to the approved estimated annual cost of operation of the planned summer classes or schools and transportation for children of migrant laborers. At the end of each school year, all unexpended funds shall be credited to Commonwealth payments due for the succeeding school year on account of the operation of such classes, or upon direction of the Superintendent of Public Instruction shall be returned to the Commonwealth.