The commissioners may, either when such ferry is established between two towns or thereafter, upon the application of ten voters of either town and after notice to both towns and a hearing, order that such towns shall maintain said ferry either jointly or alternately, and shall adjudge in what proportion they shall bear the expense of such maintenance; and the commissioners may, upon a new application and after notice and a hearing, revise such order. Their determination shall be final.
Mass. Gen. Laws ch. 88, § 7