Section 2B:23-15 - Time for making challengesa. Challenges to jurors may be made at any time before the juror is sworn to try the case.b. No challenge to a juror may be made after the juror is sworn to try the case unless: (1) the basis for the challenge could not reasonably have been known earlier to the person making the challenge; and(2) the challenge is based upon the juror's inability to render a fair and impartial verdict.