36 Pa. Stat. § 3536
Said agreement or agreements shall provide for the making and preparation of the necessary surveys, plans, and specifications by the highway departments of the Commonwealth of Pennsylvania and the State of New York, either jointly or by either, in such manner as may be agreed upon; and the letting of the contract and supervision and inspection of the work may be handled in the same manner: Provided, however, That said agreement or agreements shall make an equal division of the expense involved between the State of New York and the Commonwealth of Pennsylvania: And provided further, That each state shall secure, at its own cost and expense, the necessary right-of-way within their respective limits required for the construction of said bridges.
36 P.S. § 3536