Section 551 - Powers with respect to historical buildings, sites, objects and archaeological resources(a) To prevent the further loss of part of our national heritage and culture through the deterioration or neglect of historic buildings, sites, objects or archaeological resources within this State, including archaeological resources in or on subaqueous lands pursuant to Chapter 53 of Title 7, the Department of State may survey, examine, select for preservation, acquire, repair, restore, operate and make available for public visitation and use such historic buildings, sites, objects or archaeological resources as it may deem worthy of preservation in the best public interest for the fulfillment of the purposes of this subchapter.(b) When any property heretofore or hereafter acquired by the Department by gift, devise, purchase or otherwise is no longer needed for historical programming purposes the Department shall attempt to dispose of the property as follows: (1) If at the time of the Department's determination to dispose of the property, the property is subject to a revenue producing lease agreement which has been in force for a period of at least 5 years, the Department shall, in writing, notify the tenant that the property is no longer needed for historical programming purposes. Such notice shall inform the tenant of the Department's desire to sell the property, and include a copy of the Department's approved appraisal and a purchase agreement containing the terms and conditions for sale to the tenant. The sale price shall not be less than the approved appraised value. If the tenant elects to purchase the property, the tenant shall execute and return the purchase agreement to the Department within 30 days of such notice. Such notice is not required if the tenant has, in writing, waived any desire to purchase the property, or if the property is subject to multiple leases. Failure of the tenant to respond to the notice within 30 days shall constitute a waiver of the tenant's rights hereunder. (2) If the provisions of paragraph (b)(1) of this section do not apply, or were forfeited through lack of response, or were waived by the tenant, or the tenant fails to comply with the terms and conditions of the purchase agreement, the Department may dispose of the property in accordance with the procedures outlined in Chapter 94 of this title.(3) Prior to the sale of any historic property, the Department shall present the details of the proposed sale to the Controller General and the Director of the Office of Management and Budget for their approval.48 Del. Laws, c. 265, § 1; 29 Del. C. 1953, § 3351; 57 Del. Laws, c. 608, § 1B; 66 Del. Laws, c. 211, §1; 75 Del. Laws, c. 153, §§ 14, 15; 76 Del. Laws, c. 288, § 65.;