All real, personal and mixed property acquired from the United States of America shall be maintained intact for the uses and purposes for which it was purchased. But if the Walterboro-Colleton County airport commission shall by appropriate resolution determine that any of such real or personal property or buildings or structures thereon are surplus to the needs for the purposes of this chapter and there are no restrictions on the use or disposal if such real or personal property under the deeds of the United States of America, the commission may, after an appraisal of the value of such property by two competent disinterested appraisers, sell, dispose, transfer and convey any such real, personal or mixed property and give a good and valid title therefor and may sell the land, buildings and structures either at public auction or by sealed bids or by negotiated private sale for sums not less than the appraised value, after having given reasonable notice of the availability of such real, personal or mixed property for purchase. Provided, that whenever Colleton County resources and development board advises the commission that a desirable industry wishes to locate a facility upon properties owned by the commission and that the establishment of the industry will be economically beneficial to the citizenry of the county, the commission may sell any of its surplus property for such industry purposes without having it appraised and for such amount and under such terms as it deems advisable. Provided, further, that the commission may sell real property for use as a railroad right-of-way without having the value of such property appraised by two competent disinterested appraisers and without limiting the minimum sales price to the amount of the appraised value. Provided further, that the commission may sell any of this surplus property for school purposes without having it appraised and for such amounts and under such terms as it deems advisable. Provided further, that whenever the Colleton County resources and development board advises the commission that it would be in the best interest for the industrial development of Colleton County that an industrial building, whether to be completed, be constructed upon properties owned by the commission and that such construction will be economically beneficial to the citizens of Colleton County, the commission may sell any of its surplus property for such industry purposes without having it appraised and for such amount and under such terms as it deems advisable. (Ord. 80-O-6, 1980)