P.R. Laws Ap. tit. 34A, § II, Rule 180
The prison terms that must be imposed in the following cases shall not be served concurrently:
(a) When the convicted person has been sentenced for a crime committed while on appeal from another crime or other crimes or while released because the effects of a judgment of conviction were annulled.
(b) When the convicted person is in prison or is to be imprisoned by a sentence to imprisonment in default of the payment of any fine imposed upon him.
(c) When the convicted person committed a crime while imprisoned in a penal institution or serving any sentence.
(d) When the convicted person commits a crime while he is on parole or under conditional pardon or under any measure of conditional freedom where he is considered to be serving a sentence imposed by a court.
(e) When the convicted person has been sentenced for a crime committed while free on bail, accused of the commission of a felony.
(f) When the convicted person has been sentenced for a felony or misdemeanor, as classified in § 4248 of Title 33.
History —June 4, 1980, No. 106, p. 346, July 2, 1987, No. 87, p. 335, § 2.