Texas Local Government Code - LOC GOV'T § 615.001. Parking on County Property

(a) The commissioners court of a county by order may regulate the parking of vehicles on property owned or leased by the county.

(b) The commissioners court may adopt rules under this section to:

(c) If a county restricts or prohibits parking in a place, it shall erect an appropriately worded sign at the place to inform a driver of a vehicle of the restriction or prohibition. The county is not required to erect a sign to indicate that parking is prohibited on a lawn or other area that does not appear to be a place intended for use as a parking area.

(d) A county may provide for towing and storing a vehicle at the owner's expense if it is parked in violation of a rule adopted under this section. The county may not provide for towing a vehicle that is parked under circumstances that create a defense to prosecution under Subsection (e).

(e) A person commits an offense if the person parks a vehicle in violation of a rule adopted under this section. An offense under this section is a Class C misdemeanor. It is a defense to prosecution under this section that the place where the person parked is an area in which a sign is required under Subsection (c) and that there was no sign in place at the time the person parked.