(a) Organization. There is hereby created a commission to be known as the Unemployment Compensation Commission of New Jersey. It shall consist of seven members who shall be appointed by the Governor, with confirmation by the Senate, not more than four of whom shall be of the same political affiliation. Each member shall be reimbursed for his traveling and other expenses actually and necessarily incurred by him in the performance of his duties, and, in addition, shall receive a per diem allowance of twenty-five dollars ($25.00) for each day, or part thereof, spent in the rendition of service to or for the commission under this act; provided, however, that no member shall in any case receive per diem compensation as such member in an amount in excess of three thousand five hundred dollars ($3,500.00) for any one fiscal year. The payment heretofore of any such per diem allowance to any member of the commission for services performed under this chapter during the period from April twentieth, one thousand nine hundred and forty-five, to October seventh, one thousand nine hundred and forty-seven, is hereby approved, ratified and confirmed; and the payment hereafter of any such per diem allowance to any member of the commission for services performed under this chapter, since September first, one thousand nine hundred and forty-seven, and for which no such per diem allowance was paid, is hereby authorized. No person may be appointed who is an officer or committee member of any political party organization. First appointees to the commission shall serve as designated by the Governor at the time of appointment, as follows: one for a term of one year, one for a term of two years, one for a term of three years, one for a term of four years, one for a term of five years, one for a term of six years, and one for a term of seven years. At the expiration of initial terms, appointments shall be made for a term of seven years in each case. Any vacancies created by death, resignation or removal shall be filled by appointment for the unexpired portion of the term so vacated. The Governor may, at any time after a fair public hearing, remove any member of the commission for gross inefficiency, neglect of duty, malfeasance, misfeasance or nonfeasance in office.