The Public Notification app is currently configured such that to implement it you are required to cache a basemap which includes parcel lines. This is impractical as parcels and addresses update regularly. It does not make sense for me to have to re-cache the service weekly to assure the current parcel geometry is reflected in the basemap. After a bit of poking around I managed to add a dynamic service layer into the app such that you can see the parcels that are live on our server but it was not an easy process for someone with limited JS ability.