Me. Rev. Stat. tit. 20-A, § 3658

A Maine school district shall be entitled to receive such amount of state aid for operating expenditures as though its share of the interstate district's expenses were the expense of the Maine member district, and as though the Maine member district pupils attending the interstate schools were attending a Maine unit. Such state aid shall be paid to the Maine member school district to reduce the sums which would otherwise be required to be raised by taxation within the member district.