Regardless of cost, no sign shall be erected or placed within Vernal City without first making application for and obtaining a building permit therefor, except temporary window and political posters, temporary signs pertaining to the sale of adjacent property and nameplates or identification signs indicating the existence of an approved home occupation or professional office. In addition to the requirements of this chapter, all off-premises signs designed to be read or comprehended from state-maintained roadways shall comply with the regulations for such signs established by the state. Any building permit herein required by the regulations shall be in addition to the building permit herein required and construction or placement of a sign shall not be commenced until all approvals have been obtained. (PZSC § 03-13-010)