The Metropolitan Rapid Transit Commission shall select its own chairman, vice-chairman, secretary, treasurer and such other officers as may be required. The members thereof shall receive no compensation for their services, but shall be reimbursed for their expenses actually and necessarily incurred in the performance of their duties hereunder. Vacancies shall be filled by appointment by the Governor with the advice and consent of the Senate of the State wherein such vacancy arises.
N.J.S. § 32:22-13