(2) The blood test results and the conclusions and explanations of the blood test experts are admissible as evidence of parentage without the need for foundation testimony or other proof of authenticity or accuracy, unless a written challenge to the testing procedure or the results of the blood test has been filed with the court and delivered to opposing counsel at least 10 days before any hearing set to determine the issue of parentage. Failure to make such timely challenge constitutes a waiver of the right to have the experts appear in person and is not grounds for a continuance of the hearing to determine parentage. A copy of the results, conclusions and explanations must be furnished to both parties or their counsel at least 20 days before the date of the hearing for this subsection to apply. The court for good cause or the parties may waive the time limits established by this subsection.
(3) An affidavit documenting the chain of custody of the specimens is prima facie evidence to establish the chain of custody. [1953 c.628 §2; 1981 c.401 §3; 1985 c.671 §44; 1999 c.80 §26; 2001 c.455 §19; 2017 c.651 §28]