N.J. Stat. § 32:3-3
The commission shall consist of sixteen commissioners, eight resident voters of the Commonwealth of Pennsylvania and eight resident voters of the State of New Jersey, who shall serve without compensation.
The commissioners for the State of New Jersey shall be appointed by the Governor of New Jersey with the advice and consent of the Senate of New Jersey, for terms of five years, and in case of a vacancy occurring in the office of commissioner during a recess of the Legislature, it may be filled by the Governor by an ad interim appointment which shall expire at the end of the next regular session of the Senate unless a successor shall be sooner appointed and qualify and, after the end of the session, no ad interim appointment to the same vacancy shall be made unless the Governor shall have submitted to the Senate a nomination to the office during the session and the Senate shall have adjourned without confirming or rejecting it, and no person nominated for any such vacancy shall be eligible for an ad interim appointment to such office if the nomination shall have failed of confirmation by the Senate.
Six of the eight commissioners for the Commonwealth of Pennsylvania shall be appointed by the Governor of Pennsylvania for terms of five years. The Auditor General and the State Treasurer of said Commonwealth shall ex-officio be commissioners for said Commonwealth, each having the privilege of appointing a representative to serve in his place at any meeting of the commission which he does not attend personally. Any commissioner who is an elected public official shall have the privilege of appointing a representative to serve and act in his place at any meeting of the commission which he does not attend personally.
All commissioners shall continue to hold office after the expiration of the terms for which they are appointed or elected until their respective successors are appointed and qualify, but no period during which any commissioner shall hold over shall be deemed to be an extension of his term of office for the purpose of computing the date on which his successor's term expires.
N.J.S. § 32:3-3