P.R. Laws Ap. tit. 32A, § III, Rule 37.1
In any action the court may in its discretion direct the attorneys for the parties to appear before it for a conference to consider:
(a) The simplification of the issues;
(b) The necessity or desirability of amending the pleadings;
(c) The possibility of obtaining admissions of fact and of documents which will avoid unnecessary proof;
(d) The disclosure of the identity of the witnesses which they propose to use at the trial and the limitation of the number of expert witnesses;
(e) The advisability of a preliminary reference of issues to a master for findings of fact;
(f) Such other measures as may aid in the prompt disposition of the action.
The court shall make an order which recites the action taken at the conference, the amendments allowed to the pleadings, and the agreements made by the parties as to any of the matters considered, and which limits the issues for trial to those not disposed of by admissions or agreements of counsel; and such order, when entered, controls the subsequent course of the action unless modified at the trial to prevent manifest injustice.
The clerk shall serve the appropriate notice upon the parties at least thirty (30) days prior to the date set for the conference, except where the court upon a showing of unusual circumstances which preclude the conference to be held at such time, or upon motion by a party, orders that it be held at any other time prior to the trial.