1. Continuance of nonconforming uses permitted - discontinuance. Any lawful use, lot, or occupancy of land or premises existing at the time of the adoption of the zoning ordinance may be continued, even though the use, lot, or occupation does not conform to the provisions of the ordinance. However, if the nonconforming use, lot, or occupancy is discontinued for a period of more than one year, any subsequent use, lot, or occupancy of the land or premises shall conform with the zoning ordinance. (Source: SDCL 11-2-26)
2. Gradual elimination of discontinued nonconforming uses. The governing body may by resolution as provided in SDCL 11-2-25 prescribe such regulations not contrary to law or SDCL 11-2-26, as it deems desirable or necessary to regulate and control, or reduce the number or extent of or bring about the gradual elimination of nonconforming uses, lots, or occupancies. However, in accordance with the provisions of SDCL 11-2-26, any lawful use, lot, or occupancy of land or premises existing at the time of the adoption of the zoning ordinance may be continued, even though the use, lot, or occupancy does not conform to the provisions of the zoning ordinance. If the use, lot, or occupancy is discontinued for more than one year, the board may adopt, after notice by registered or certified mail to the property owners, an amortization schedule to bring about the gradual elimination of the nonconforming use, lot, or occupancy. (Source: SDCL 11-2-27)