HSC §6591: (a) In the case of an elected district board, the directors may be elected by divisions if a majority of the voters voting upon the question are in favor of the question at a general district or speci

(a) In the case of an elected district board, the directors may be elected by divisions if a majority of the voters voting upon the question are in favor of the question at a general district or special election. Conversely, in the case of a district that has an elected district board which is elected by election division, the directors may be elected at large if a majority of the voters voting upon the question are in favor of the question at a general district or special election. (b) As used in this section, “election by division” means the election of each member of the district board by voters of only the respective election division. (c) The district board may adopt a resolution placing the question on the ballot. Alternatively, upon receipt of a petition signed by at least 5 percent of the registered voters of the district, the district board shall adopt a resolution placing the question on the ballot. (d) If the question is submitted to the voters at a general district election, the notice required by Section 12112 of the Elections Code shall contain a statement of the question to appear on the ballot. If the question is submitted to the voters at a special election, the notice of election and ballot shall contain a statement of the question. (e) If the majority of voters voting upon the question approves the election of directors by divisions, the district board shall promptly adopt a resolution dividing the district into as many divisions as there are directors. The resolution shall assign a number to each division. Using the last decennial census as a basis, the divisions shall be as nearly equal in population as possible. In establishing the boundaries of the divisions the district board may give consideration to the following factors: (1) topography, (2) geography, (3) cohesiveness, contiguity, integrity, and compactness of territory, and (4) community of interests of the divisions. (f) If the majority of voters voting upon the question approves the election of directors by division, the board members shall be elected by election divisions and each member elected shall be a resident of the election division from which he or she is elected. At the district general election following the approval by the voters of the election of directors by divisions, the district board shall assign vacancies on the board created by the expiration of terms to the respective election divisions and the vacancies shall be filled from those election divisions. (g) If the majority of voters voting upon the question approves the election of directors at large, the district board shall promptly adopt a resolution dissolving the election divisions which had existed.