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to permitted uses, and (iii) the gradual elimination of the buildings and structures when they are destroyed or damaged in major part; nor shall they be exercised so as to impose regulations, eliminate uses, buildings, or structures, or require permits with respect to land used for agricultural purposes, which includes the growing of farm crops, truck garden crops, animal and poultry husbandry, apiculture, aquaculture, dairying, floriculture, horticulture, nurseries, tree farms, sod farms, pasturage, viticulture, and wholesale greenhouses when such agricultural purposes constitute the principal activity on the land, other than parcels of land consisting of less than 5 acres from which $1,000 or less of agricultural products were sold in any calendar year in counties with a population between 300,000 and 400,000 or in counties contiguous to a county with a population between 300,000 and 400,000, and other than parcels of land consisting of less than 5 acres in counties with a population in excess of 400,000, or with respect to the erection, maintenance, repair, alteration, remodeling or extension of buildings or structures used or to be used for agricultural purposes upon such land except that such buildings or structures for agricultural purposes may be required to conform to building or set back lines and counties may establish a minimum lot size for residences on land used for agricultural purposes; nor shall any such powers be so exercised as to prohibit the temporary use of land for the installation, maintenance and operation of SB3019 Enrolled LRB104 20255 HLH 33706 b Public Act 104-0468