(a) This section applies only to a public health order imposed on more than one individual, animal, place, or object.
(b) A public health order issued by a health authority under this chapter or other law expires on the 15th day following the date the order is issued unless, before the 15th day by majority vote:
(1) the governing body of a municipality or the commissioners court of a county that appointed the health authority extends the order for a longer period; or
(2) if the health authority is jointly appointed by a municipality and county, the commissioner's court of the county extends the order for a longer period.