(h) If a party, in the exercise of reasonable diligence, first becomes aware after the pre-trial conference of the necessity or desirability of using a witness, an exhibit, a hypothetical question, plot or plan, they shall forthwith provide the court and other counsel with the same information with respect to such witness, exhibit hypothetical question, plot or plan as is required on the pre-trial statement set forth in (e) above. Failure to provide such information shall not be in compliance with this subsection, and may, in the discretion of the court, justify refusal by the court to permit the use of such witness, exhibit, hypothetical question, plan or plot at trial.