Tex. Local Government Code § 391.002: DEFINITIONS.

In this chapter:

(1) "Governmental unit" means a county, municipality, authority, district, or other political subdivision of the state.

(2) "Commission" means a regional planning commission, council of governments, or similar regional planning agency created under this chapter.

(3) "Region" means a geographic area consisting of a county or two or more adjoining counties that have, in any combination:

(A) common problems of transportation, water supply, drainage, or land use;

(B) similar, common, or interrelated forms of urban development or concentration; or

(C) special problems of agriculture, forestry, conservation, or other matters.

Acts 1987, 70th Leg., ch. 149, Sec. 1, eff. Sept. 1, 1987.