A vehicle or part thereof which is located behind a solid fence six feet in height which is not plainly visible from any highway or adjoining property may remain on the site if the owner can provide proof that the vehicle is being restored. Physical evidence of progress and/or receipts for materials to be used in the restoration shall constitute proof. If the vehicle is being restored, the owner shall obtain an "intention to restore" permit from the City Manager or his designee providing proof of restoration. Permit cost shall be established by City Council resolution and the permit shall be valid for a period of twelve months. If additional proof of progress can be shown at the end of the twelve-month period, the permit may be renewed for a period of twelve months. Two renewals shall be permitted. One such permit shall be allowed for any legally existing residential lot measuring up to ten thousand square feet. One additional permit may be obtained for a lot with an area above ten thousand square feet. Any lot owner requesting more than two permits must apply for and receive approval for a conditional use permit. (Ord. 2637 § 4, 1988).