At least thirty days before the next general election of such district the board of directors thereof may make an order, dividing said district into divisions, as nearly equal in size as practicable, being in number as in Section 5 [73-10-5 N.M. Stat. Ann.] of this act provided and which shall be numbered consecutively, and one director shall be elected for each division by the qualified electors of the whole district. For the purpose of election in such district the said board of directors must establish a convenient number of election precincts and define the boundaries thereof, which said precincts may be changed from time to time, as the board of directors may deem necessary.