Any antenna or tower that is not operated for a continuous period of 12 months shall be considered abandoned, and the owner of such antenna or tower shall remove the same within 90 days of receipt of notice from the Borough of Midland Park notifying the owner of such abandonment. Failure to remove an abandoned antenna or tower within said ninety-day period shall be grounds to remove the tower or antenna at the owner's expense. If there are two or more users of a single tower, then this provision shall not become effective until all users cease using the tower. The Borough may condition the issuance of any permit to construct, demolish or remove a tower or antenna on the posting of an appropriate performance bond or other suitable guarantee in a face amount of not less than 120% of the cost (as determined by the approving authority) of such removal, grading and restoration to a state required under all applicable Borough ordinances, including but not limited to the Borough Property Maintenance Code.