(a) The commissioners court of a county by order may establish visual aesthetic standards for automotive wrecking and salvage yards, junkyards, recycling businesses, flea markets, demolition businesses, and outdoor resale businesses in the unincorporated area of the county.
(b) The commissioners court may not include in an order adopted under this section a screening requirement for an automotive wrecking and salvage yard or a junkyard that is less restrictive than the screening requirement under Chapter 396, Transportation Code.

(c) An order adopted under this section must provide a reasonable period of time not to exceed 12 months for a business operating on the effective date of the order to comply with the visual aesthetic standards.