A nonconforming sign must be brought into conformity with the provisions of the Cincinnati
Zoning Code then in effect if the sign is structurally altered, rebuilt, enlarged,
extended, or relocated; or when the principal use of the property is changed from
a commercial use to a residential use; provided, however, the repainting or refacing
of an existing nonconforming sign is not considered an alteration within the meaning
of this section.
