Section 14-20-18 - (308) Challenge after expiration of period for rescission1. After the period for rescission under section 14-20-17 has expired, a signatory of an acknowledgment of paternity or denial of paternity may commence a proceeding to challenge the acknowledgment or denial only:a. On the basis of fraud, duress, or material mistake of fact; andb. Within two years after the acknowledgment or denial is filed with the department of health and human services.2. A party challenging an acknowledgment of paternity or denial of paternity has the burden of proof.Amended by S.L. 2021, ch. 352 (HB 1247),§ 60, eff. 9/1/2022.Amended by S.L. 2013, ch. 124 (SB 2107),§ 5, eff. 8/1/2013.