In this subchapter:
(1) "Extraterritorial jurisdiction" means a municipality's extraterritorial jurisdiction as determined under Chapter 42, except that for a municipality that has a population of 5,000 or more and is located in a county bordering the Rio Grande River, "extraterritorial jurisdiction" means the area outside the municipal limits but within five miles of those limits.
(2) "Plat" includes a preliminary plat, final plat, and replat.