Each member of the commission shall appoint an alternate to act in his place and stead, with authority to attend all meetings of the commission, and with power to vote in the absence of the member. Unless otherwise provided by law of the signatory party for which he is appointed, each alternate shall serve during the term of the member appointing him, subject to removal at the pleasure of the member. In the event of a vacancy in the office of alternate, it shall be filled in the same manner as an original appointment for the unexpired term only.
N.J.S. § 32:11D-9