Tex. Auxiliary Water Laws § 5

All political subdivisions are hereby authorized to take all necessary and reasonable actions to comply with the requirements and criteria of the National Flood Insurance Program including but not limited to:

(1) Making appropriate land use adjustments to constrict the development of land which is exposed to flood damage and minimize damage caused by flood losses;

(2) Guiding the development of proposed future construction, where practicable, away from location which is threatened by flood hazards;

(3) Assisting in minimizing damage caused by floods;

(4) Authorizing and engaging in continuing studies of flood hazards in order to facilitate a constant reappraisal of the flood insurance program and its effect on land use requirements;

(5) Engaging in flood plan management and adopting enforcing permanent land use and control measures consistent with the criteria established under the National Flood Insurance Act;

(6) Declaring property, when such is the case, to be in violation of local laws, regulations or ordinances which are intended to discourage or otherwise restrict land development or occupancy in flood-prone areas, and notifying the Secretary, or whomever he designates, of such property;

(7) Consulting with, giving information to and entering into agreements with the Department of Housing and Urban Development for the purpose of

(a) Identifying and publishing information with respect to all flood areas, including coastal areas, and

(b) Establishing flood-risk zones in all such areas, and make estimates with respect to the rates of probable flood-caused loss for the various flood-risk zones for each of these areas;

(8) Cooperating with the Secretary's studies and investigations with respect to the adequacy of local measures in flood-prone areas as to land management and use, flood control, flood zoning, and flood damage prevention;

(9) Taking steps to improve the long-range management and use of flood-prone areas;

(10) Purchasing, leasing and receiving property from the Secretary, when such property is owned by the Federal Government and lies within the boundaries of the political subdivision, pursuant to agreements with the Department of Housing and Urban Development or other appropriate legal representative of the United States Government;

(11) Requesting aid pursuant to the entire authorization above from the Texas Water Development Board;

(12) Satisfying criteria adopted and promulgated by the Department pursuant to the National Flood Insurance Program; and

(13) Adopting permanent land use and control measures with enforcement provisions which are consistent with the criteria for land management and use adopted by the Secretary.