A commissioners court may not establish a county election precinct containing territory inside a city with a population of 10,000 or more and unincorporated territory outside that city unless the commissioners court determines that either of the two areas:
(1) cannot constitute a separate election precinct of suitable size or shape that contains the permissible number of voters; or
(2) cannot be combined with other territory on the same side of the city boundary to form an election precinct of a suitable size or shape that contains the permissible number of voters without causing another election precinct to fail to meet those requirements.