P.R. Laws Ap. tit. 32A, § IV, Rule 11
(A) Courts may take judicial notice of facts which are not reasonably subject to dispute because:
(1) They are generally known within the territorial jurisdiction of the court, or
(2) they are capable of accurate and ready determination by resorting to sources whose accuracy cannot reasonably be questioned.
(B) Courts may take judicial notice on their own initiative and shall take judicial notice when requested by a party if it provides the court with enough information to enable it to take such notice.
(C) The party requesting the taking of judicial notice of a fact shall notify its request to the adverse party in order to give the latter an opportunity to prepare and meet the request, if it so desires. A party is entitled to an opportunity to be heard as to the propriety of taking judicial notice.
(D) Courts may take judicial notice at any stage of the proceedings, including the appellate stage.
(E) In criminal trials by jury, the judge shall instruct the jurors that they shall accept as conclusive any fact judicially noticed.