(a) A petition requesting an election on the sale or closing of the hospital may be presented to the commissioners court and the municipal governing body before the 31st day after the date the commissioners court and the governing body order the sale or closing.
(b) The petition must be signed by at least 10 percent of the qualified voters of the county and any part of the municipality that is not in the county.
(c) On receipt of the petition, the commissioners court and the governing body shall order and conduct the election. The commissioners court and the governing body may sell or close the hospital only if a majority of the qualified voters voting at the election approve the sale or closing.
(d) The number of qualified voters of the county and any part of the municipality that is not in the county is determined according to the most recent official list of registered voters.