Penn. 37 C.P.L. 212.3
Counsel attending the pre-trial conference must have full and complete authority to stipulate on items of evidence, admissions, and settlement. In the absence of such authority, counsel shall have their client immediately available, either in person or by telephone.
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, he 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 Rule L212.2 above. Failure to provide such information no less than 48 hours before selection of the jury, or commencement of trial in a non-jury case, may, in the discretion of the court, justify refusal by the court to permit the use of such witness, exhibit, hypothetical question, plot or plan at trial.
Penn. 37 C.P.L. 212.3