(1) No voting precinct shall be established, created, consolidated, divided, or the boundaries otherwise altered unless ordered by a court of competent jurisdiction, by reason of an annexation or other change in the boundary of a county or municipality, or in accordance with subsection (b). Any precinct boundary that is altered in accordance with this subsection (a) shall coincide with a census block as designated by the United States census bureau in the latest federal decennial census.
(2) The county election commission may establish, consolidate, or change the boundaries of precincts whenever the public convenience or law requires it; provided, that if any precinct boundary is altered pursuant to this subsection (b) then all of the following conditions must be met: Any precinct boundary that is altered shall coincide with a census block as designated by the United States census bureau in the latest federal decennial census; and
(3) After December 31, 2018, all precinct boundaries within the jurisdiction of the county election commission that do not coincide with a census block as designated by the United States census bureau in the latest federal decennial census shall be altered so that the precinct boundaries do coincide with a census block as designated by the United States census bureau in the latest federal decennial census.
(4) Any county election commission that alters the boundaries of any voting precinct in accordance with this section shall send a map, or geographic information systems file, to the office of local government which clearly delineates the new boundaries of the voting precinct.