The following signs are exempt from the requirements to obtain a permit before erection:
- Painted nonilluminated signs.
- Temporary signs announcing the sale or rent of property.
- Signs erected by transportation authorities.
- Projecting signs not exceeding 2.5 square feet (0.23 m2).
- The changing of moveable parts of an approved sign that is designed for such changes, or the repainting or repositioning of display matter shall not be deemed an alteration.