Any sign erected after October 1, 1972, without a permit having been granted therefor, and any nonconforming sign which subsequently violates s. 84.30, Stats., or these rules, shall be subject to removal as an illegal sign. Upon removal of an illegal sign, the owner of the sign shall be given 30 days in which to salvage the sign upon payment of actual reasonable costs incurred in removing the sign. If not salvaged, the sign may be disposed of as the department deems appropriate.
Wis. Admin. Code Department of Transportation Trans 201.09