Billboards and other advertising signs are regulated by state and federal laws on most state highways. Read the department's Highway Advertising Control booklet, M 22-95. WSDOT issues advertising sign permits for locations on private property along regulated state highways within commercial or industrial areas. There is a one-time $300 non-refundable permit application fee per sign structure. These permits are valid for the year in which they are issued and must be renewed on an annual basis; there is no renewal fee.