Wireless telecommunications towers and equipment which are not operated for wireless telecommunications purposes for a continuous period of six months shall be considered abandoned and shall be removed by the owner, at the owner's expense. This removal shall occur within 90 days at the end of such six month period of inactivity. If such wireless telecommunications tower is not removed within the 90 day period, the municipality may remove the tower and its structures at the owner's expense. If the facility is to be retained, its owner shall provide proof that the facility will be reused within one year of such discontinuation. If the facility is not used within one year, a demolition permit shall be obtained and the facility removed. Upon removal, the site shall be cleaned, cleared restored and revegetate to pre-construction conditions. To insure the removal of abandoned towers and related telecommunications facilities, the facility owner shall be responsible to post a bond at the time a construction permit is issued to cover the costs of tower removal and site restoration.