(a) The governing body of the hospital district shall order and conduct an election on the sale or closing of a hospital if, before the 31st day after the date the governing body orders the sale or closing, the governing body receives a petition requesting the election signed by at least 10 percent of the qualified voters of the hospital district. The number of qualified voters of the hospital district is determined according to the most recent official lists of registered voters.
(b) If a petition is filed under Subsection (a), the hospital may be sold or closed only if a majority of the qualified voters voting on the question approve the sale or closing.