In the event that the federal Social Security Act shall be extended by the Congress of the United States to municipal employees, the governing body of any municipality may take all steps necessary to qualify its employees, subject to the terms of this chapter, for benefits under the retirement provisions of the said Social Security Act. In such event, the benefits received under and by virtue of any retirement plan established under the provisions of this chapter shall be reduced by the benefits received under the federal Social Security Act.
N.D.C.C. § 40-45-18