Billboards shall only be permitted in the U11b Districts upon prior approval of the Planning Commission and a majority vote of City Council. No billboard, advertising any product or use not located on the same lot shall be permitted in any zoning district in the City unless located in the U11b District. Notwithstanding any other provision contained in the Planning and Zoning Code, owners and applicants for all permitted advertising devices or signs located within 660 feet of the edge of the right-of-way of an interstate or primary State highway shall make application for a permit from the Director of the Department of Transportation of the State of Ohio and comply with all provisions of Ohio Revised Code Chapter 5516 prior to applying for a permit from the City. Interstate and primary highways shall have the same definition set forth in Chapter 5516 of the Ohio Revised Code.