California Code, Welfare and Institutions Code - WIC § 966

If a board of trustees is chosen to govern and manage the adjustment school the term of office of the trustees shall be six years, except that of the seven trustees first selected, two shall hold office for two years, two shall hold office for four years, and three shall hold office for six years. Each of the two-, four-, and six-year terms shall be assigned by lot to each of the seven trustees.