If land is included within a district pursuant to Chapter 2 (commencing with Section 75850) of Part 10 of this division, the board shall, not less than 30 days before any election in the district, reestablish the boundaries of the divisions and election precincts within the district so as to include such lands therein and so as to make such divisions as nearly equal in area as may be practicable. In case of the inclusion of any land less than 30 days before an election within the district, the inhabitants of the land so included shall not be entitled to vote at such election.