P.R. Laws Ap. tit. 34A, § II, Rule 181
When a person is serving a sentence and is summoned to trial before any court of justice, the director or person in charge of the penal institution where the said person is confined shall send to the judge of the court who requires the appearance, a certificate with a copy, describing the details of said imprisonment, specifying the form in which the said person is serving sentence. If the person is awaiting trial, or his case is on appeal, the time he remains in such condition, the crime and order of detention shall be specified. In every case there shall be sent a statement of the penal record of the said person, stating the number of the case, the crime, the penalty, trial court, date of said sentence, date on which he began to serve it, the executive clemency received or the form in which and the date on which he served the sentence. If the person has cases on appeal or orders of imprisonment against him, whether bond has been given or not, it shall be reported in the same manner as provided above in this rule.