§ 15. Freedom from toll and ferriage. The Indians of the Six Nations may pass and repass free of toll and ferriage, at all seasonable times of the day, on any turnpike road, which shall have been established since April sixth, eighteen hundred and three, or which shall hereafter be established, leading from or through the town of Canandaigua to Buffalo creek or its vicinity, and over any toll bridge between those places, and at the ferry across the Niagara river at or near Black Rock, or at such place or places in its vicinity where any ferry shall have been established since such time, or shall hereafter be established.