Which vehicles are exempt from the requirement to have electrical turn signals?

• All passenger cars and trucks manufactured before 1960.
• Passenger cars and trucks less than 80 inches in width manufactured before 1960.
  Explanation:

  "Passenger cars and trucks less than 80 inches in width and manufactured before 1960 are not required to have electrical turn signals."
• Passenger cars and trucks more than 80 inches in width manufactured before 1960.
• All passenger cars and trucks less than 80 inches in width.