(b) The terms of board members shall be staggered initially from the first day of July, one thousand nine hundred ninety-seven. The governor shall appoint initially three members for a term of one year and two members for a term of two years. Subsequent appointments shall be for a term of two years. Each member shall serve until that member's successor is appointed and qualified, unless the board member is no longer competently performing the duties of office. Any vacancy on the board shall be filled by the governor for the balance of the unexpired term. The governor may remove members of the board from office for cause.