A person may not drive a passenger car or light truck while towing a trailer, semi-trailer, or house trailer on a public highway in Texas unless:

• The trailer has a cover.
• Safety chains are attached from the trailer to the towing vehicle.
  Explanation:

  "A person may not drive a passenger car or light truck while towing a trailer, semi-trailer, or house trailer on a public highway in Texas unless safety chains are attached from a trailer, semi-trailer, or house trailer to the towing vehicle."
• The trailer has a weight limit sign.
• The trailer has functioning brake lights.