The appeal board is hereby continued. Such board shall consist of five salaried members, not more than three of whom shall be adherents of the same political party. One of the members of the board shall be designated as chairman by the governor. The governor shall appoint or reappoint members for terms of six years. Vacancies shall be filled by appointment by the governor for the unexpired term. A member of the board may be removed by the governor for cause, after a hearing. Any hearing, inquiry, or investigation required or authorized to be conducted or made by the board may be conducted or made by any individual member thereof, and the order, decision, or determination of such member shall be deemed the order, decision, or determination of the board from the date of filing thereof in the department, unless the board on its own motion or on application duly made to it modify or rescind such order, decision, or determination. The board shall establish and maintain a current index, by topic, of the principles of law established by the decisions rendered by the board and the courts concerning matters arising under this article. Such index shall cite all appropriate authority which supports such principles and, where appropriate, all conflicting authority. Such index shall also contain a glossary of technical and statutory terms commonly used by the board in its decisions. Copies of such index shall be open for public inspection and examination, and shall be made available at all locations where unemployment insurance hearings, authorized or mandated by § 620 (Referees’ hearings)section six hundred twenty of this chapter, are conducted.