Tex. Gov't Code § 442.001 : GOVERNMENT CODE — EXECUTIVE BRANCH — HISTORY, CULTURE, AND EDUCATION — TEXAS HISTORICAL COMMISSION — GENERAL PROVISIONS — Definitions TEXT PDF In this chapter: (1) "Historic courthouse" means a county courthouse that is at least 50 years old. The term includes a structure that: (A) previously functioned as the official county courthouse of the county in which it is located; and (B) is owned by a municipality. (2) "Historic courthouse project" means a project to preserve or restore a historic courthouse. (3) "Historic structure" means a structure that: (A) is included on the National Register of Historic Places; (B) is designated as a Recorded Texas Historic Landmark; (C) is designated as a State Archeological Landmark; (D) is determined by the Texas Historical Commission to qualify as eligible property under criteria for inclusion on the National Register of Historic Places or for designation as a Recorded Texas Historic Landmark or as a State Archeological Landmark; (E) is certified by the Texas Historical Commission to other state agencies as worthy of preservation; or (F) is designated by an ordinance of a municipality with a population of more than 1.5 million as historic. Tex. Gov't. Code § 442.001 Amended by Acts 2013, Texas Acts of the 83rd Leg. - Regular Session, ch. 1100,Sec. 1, eff. 9/1/2013. Amended By Acts 1999, 76th Leg., ch. 403, Sec. 1, eff. 9/1/1999. Amended by Acts 1997, 75th Leg., ch. 1056, Sec. 2, eff. 6/19/1997 Acts 1987, 70th Leg., ch. 147, Sec. 1, eff. 9/1/1987.