(a) Nothing in this subchapter shall authorize any removal or restriction on outdoor advertising erected or approved by the appropriate governmental authority to be erected before July 18, 2000.
(b) Outdoor advertising signs, displays, and devices to be erected along a designated Delaware byway or within the 660 ft. control zone of a designated Delaware byway, provided they are in accordance with the provisions listed in Chapter 11 of this title, shall be limited to the following:
(1) Directional and other official signs and notices, which signs and notices shall include, but not be limited to, signs and notices pertaining to natural wonders, scenic and historic attractions as authorized or required by the laws of this State;
(2) Signs, displays and devices advertising the sale or lease of the real property upon which they are located;
(3) Signs, displays and devices advertising activities conducted on the real property upon which they are located;
(4) Gateway signs as defined by § 1102 of this title;
(5) Beautification/landscape planting sponsorship signs located within the right-of-way of a Delaware byway;
(c) For the purposes of this section “outdoor advertising” has the same meaning as defined by § 1102 of this title.