MUNICIPAL AND COUNTY AUTHORITY.

(a) A municipality or a county may not adopt or enforce an ordinance that establishes a safety standard or practice applicable to a facility that is regulated under this subchapter, another state law, or a federal law. (b) Except as provided by Subsection (a) and by Section 121.2025, this subchapter does not reduce, limit, or impair: (1) a power vested by law in: (A) a county in relation to a county road; or (B) a municipality; or (2) the ability of a municipality to: (A) adopt an ordinance that establishes conditions for mapping, inventorying, locating, or relocating pipelines over, under, along, or across a public street or alley or private residential area in the boundaries of the municipality; or (B) establish conditions for mapping or taking an inventory in an area in a municipality's extraterritorial jurisdiction.