If the use required improvements are not completed or corrected in accordance with the performance guaranty, the obligor and surety, if any, shall be liable thereon to the Township for the reasonable cost of the improvements not competed or corrected, and the Township may, either prior to or after the receipt of the proceeds thereof, complete such improvements. Additionally, the performance guaranty shall include a clause providing that in the event that an development for which the performance guaranty was posted is started and then abandoned by the developer prior to issuance of a building permit, but after the start of site clearing and/or improvement installation, the performance guaranty shall be used to restore the site sufficient to allow its future use and stabilize any disturbance.