§ 20.28.220 SIGN MATERIAL.
   All signs and sign structures requiring a permit shall be constructed of wood, metal, or comparable weatherproof material, shall be so enclosed as to provide against their infestation by birds and vermin, and shall be structurally safe. No material more combustible than wood shall be used in the construction of any permanent exterior sign.
(Ord. 425, passed 10-14-68)