Only official identification, directional, or traffic control signs (as defined in Minnesota Laws 1971, Chapter 173, Section 173.02, Subdivision 6 (a), (b), and (d), shall be allowed within the public right-of-way with the following exceptions:
Signs not exceeding four (4) square feet in area and bearing only property numbers, post office box numbers, names of occupants, or other identification of premises, not having commercial connotations
Flags and insignias of any government except when displayed in connection with commercial promotion
Legal notices, identification, information, or directional signs erected or required by governmental bodies (as defined in Minnesota Laws 1971, Chapter 173, Section 173.02, Subddivision 6)
Integral decorative or architectural features of a building, except letters, trademarks, moving parts, or moving lights
Signs directing and guiding traffic and parking on private property, but bearing no advertising matter
A temporary sign indicating real estate for rent or for sale related to the premises only on which it is located (and not exceeding six (6) square feet in area)
In any case, the supporting structure shall not be constructed of: wood posts larger than 4 inches by 4 inches square or 6 inches diameter round; metal posts larger than 2 inches by 2 inches by 1/4 inch wall square tubing or 2 inches diameter by 1/4 inch wall round tubing; metal 'U' channel posts exceeding transportation department specifications.
Any other sign or advertising device shall comply with County Zoning Ordinances, which requires a permit from that office.