Section 8303 - Designation of the Governor Robert P. Casey Highway as scenic byway(a) General rule.--Because of its outstanding scenic, historic, recreational, cultural and archeological characteristics, the portion of U.S. Route 6, between the intersection of U.S. Route 6, with Route 81 in Dunmore Borough, Lackawanna County, and the intersection of Business Route 6 in Carbondale Township, Lackawanna County, totaling 15.53 miles, commonly known as the Governor Robert P. Casey Highway, is designated as a scenic byway.(b) Effect of designation.-- No outdoor advertising device, as defined in section 3 of the act of December 15, 1971 (P.L. 596, No. 160), known as the Outdoor Advertising Control Act of 1971, may be erected if the sign is visible from the main-traveled way of the scenic byway and the purpose of the sign is that its message be read from the main-traveled way of the scenic byway, except: (1) the official signs and notices which are required or authorized by law and which conform to the national standards promulgated by the Secretary of Transportation of the United States pursuant to 23 U.S.C. § 131 (relating to control of outdoor advertising);(2) outdoor advertising devices advertising the sale or lease of the real property upon which they are located;(3) outdoor advertising devices advertising activities conducted on the property on which they are located, including devices which display a message that may be changed at reasonable intervals by electronic process or remote control; and(4) directional signs, including, but not limited to, signs pertaining to natural wonders, scenic and historical attractions and other points of interest to the traveling public which conform to the national standards promulgated by the Secretary of Transportation of the United States pursuant to 23 U.S.C. § 131.2003, Nov. 6, P.L. 203, No. 33, §1, effective in 60 days [ 1/5/2004].