With Monica’s famous dress CoC isn’t an issue because the CoC of the dress once submitted can be preserved anything before that isn’t important because if it is semen and it’s Bills then Bill needs to have a plausible explanation on how it got onto the dress in a manner that didn’t involve the stroking of his cigar.

With these kits there is no way to validate that the evidence was actually collected from the victim and not from say a toothbrush.

Monica’s dress in this case is well the victims vagina or any other body part that was assaulted and may contain DNA evidence of the assailant not the kit.