Sec. 3. DEFINITIONS. As used in this Act, unless the context clearly requires otherwise:

(a) "Agency" means the Texas Water Quality Board.

(b) "Agreement" means a written agreement or contract between the State of Texas and the United States, authorizing the State of Texas, through (name of an existing agency), to regulate the discharge of dredged or fill material in the navigable waters of the state under the authority granted by Section 404, as defined in this Act.

(c) "Corps of engineers" means the United States Army Corps of Engineers.

(d) "Discharge of dredged or fill material" has the same meaning as it has in Section 404 as defined in this Act.

(e) "Navigable waters" has the same meaning within the boundaries of the State of Texas as it has in Section 404 as defined in this Act.

(f) "Section 404" means Section 404, Federal Water Pollution Control Act Amendments of 1972 (33 U.S.C. Section 1344), as it may be amended, and such regulations as may be from time to time promulgated thereunder.