P.R. Laws Ap. tit. 32A, § III, Rule 41.1
The court in which any action or proceeding is pending may appoint a special master therein. As used in these rules, the word “master” includes a referee, an auditor and an examiner. The compensation to be allowed to a master shall be fixed by the court, and shall be charged upon such of the parties as the court may order, or paid out of any fund or property involved in the action, which is in the custody and control of the court, as the court may direct. The master shall not retain his report as security for his compensation, but when the party ordered to pay the compensation allowed by the court does not pay it after notice and within the time prescribed by the court, the master is entitled to a writ of execution against such a party. Also, if a party without just cause refuses to comply with the order to pay the master’s compensation, the court may impose penalties in accordance with Rule 34.2.