Texas Natural Resources Code - NAT RES § 31.163. Rezoning

(a) If the plan would require zoning inconsistent with any existing zoning or other land use regulation, the division or its designated representative may at any time submit a request for rezoning to the local government with jurisdiction over the real property in question.

(b) The rezoning or variance request shall be submitted in the same manner as any such request is submitted to the affected local government;  provided, however, the local government must take final action on the request no later than the 120th day after the date the request for rezoning or variance is submitted.

(c) Failure by the local government to act within the 120-day period prescribed by Subsection (b) will be deemed an approval of the rezoning request by the local government.