(a) Within 30 days after the date the commissioners court receives a notice under Section 452.713(a)(2), the commissioners court, by order, shall designate not more than five units of election in the unincorporated area of the county.
(b) The boundaries of each designated unit of election must coincide with a county voting precinct so that, to the extent practicable, no county voting precinct is divided between two or more designated units of election.