Signs or signage which meet the definition of a pole sign (including billboards) in this Ordinance are considered to be nonconforming, and shall be removed or replaced with signage which conforms to the requirements of this Ordinance no later than July 1, 2006. Existing lawfully-placed signs associated with an approved Master Sign Plan shall be exempt from this provision. Owners of record for such signs shall be notified of the nonconformity via mailed notice.