It depends on the nature of the hearing. I have seen objections made at the time of the first hearing in the case, in which case the court sets up a process for handling it. If there is no rule as to the timing of the objection, then the judge will likely consider the objection timely. Indeed, courts have a preference for dealing with objections on the merits, rather than deny them based on a strict enforcement of the rules when any prejudice to the other parties can be cured.
Answered on Mar 25th, 2013 at 4:44 PM