(a) A plat filed under § 232.023 is not valid unless the commissioners court of the county in which the land is located approves the plat by an order entered in the minutes of the court. The commissioners court shall refuse to approve a plat if it does not meet the requirements prescribed by or under this subchapter or if any bond required under this subchapter is not filed with the county clerk.
(b) If any part of a plat applies to land intended for residential housing and any part of that land lies in a floodplain, the commissioners court shall not approve the plat unless:
(1) the subdivision is developed in compliance with the minimum requirements of the National Flood Insurance Program and local regulations or orders adopted under § 16.315, Water Code; and
(2) the plat evidences a restrictive covenant prohibiting the construction of residential housing in any area of the subdivision that is in a floodplain unless the housing is developed in compliance with the minimum requirements of the National Flood Insurance Program and local regulations or orders adopted under § 16.315, Water Code.

(c) On request, the county clerk shall provide the attorney general or the Texas Water Development Board:
(1) a copy of each plat that is approved under this subchapter; or
(2) the reasons in writing and any documentation that support a variance granted under § 232.042.
(d) The commissioners court of the county in which the land is located may establish a planning commission as provided by Subchapter D. The planning commission, including its findings and decisions, is subject to the same provisions applicable to the commissioners court under this subchapter, including § 232.034 relating to conflicts of interest.