The Board of Commissions of the county shall have authority, upon proper application in writing and upon good cause shown, to grant permits for transmitting vehicles whose total gross weight exceed 20,000 pounds, whenever in its discretion such highway will not be seriously damaged thereby, even though said highway is then posted. Any such permit shall be issued for a single trip or for a definite period of time not exceeding 60 days, and such permit may designate the route to be traversed and contain any other instruction or conditions determined necessary.
(1983 Code, Ch. 81, § 5-81-4)