Delaware Code Title 25. Property § 5504. Defense to an action for waste

(1) Is one which a prudent owner of an estate in fee simple absolute of the affected property would be likely to make in view of the conditions existing on or in the neighborhood of the affected property; or

(2) Has not reduced the market value of the reversion or other interest of the plaintiff; and

(3) If the conditions set forth in paragraph (a)(1) or (a)(2) of this section exist, and the landlord makes a demand that the tenant posts security to protect against a failure to complete the proposed work, and against any responsibility for expenditures incident to the making of such proposed repairs, alterations or replacements as the court demands.