P.R. Laws tit. 4, § 1162
To any person sentenced for acts committed prior to or during the effective date of the new Penal Code of the Commonwealth of Puerto Rico to a term of imprisonment, in addition to the credits authorized in the preceding section, the corrections administrator may award credits at the rate of not more than five (5) days for each month in which the inmate is employed at some trade or is pursuing studies as part of an institutional plan, be it in the community at large or at the penal facility where he/she is serving his/her sentence, and is rendering services at the penal institution during the first year of imprisonment. Credit of up to seven (7) days per month may be granted for each subsequent year.
If the work or service rendered by the inmates is in the agricultural field, the Corrections Administrator shall award monthly credits up to a total of not more than seven (7) days during the first year of imprisonment, and up to a total of not more than ten (10) days a month during the periods of imprisonment subsequent to the first year.
The abovementioned credits may be awarded during the time any person accused of any public offense had been deprived of his/her freedom, if he/she is sentenced for the same acts for which he/she may have been deprived of his/her freedom, subject to the provisions of the preceding paragraphs.
The credits provided may also be awarded on account of exceptionally meritorious services or the discharge of highly important duties in connection with institutional functions.
In the case of persons sentenced to terms of imprisonment for crimes committed under the new Penal Code of 2004, the Corrections Administrator may grant credits at the rate of one day per month in which the inmate is employed or is following studies or rendering services at the penal institution or for exceptionally meritorious or highly important services.
Provided, That any inmate sentenced to serve a prison term of ninety-nine (99) years before July 20, 1989, including any inmate whose conviction has given rise to a determination of aggravated recidivism or habitual recidivism, both situations pursuant to the repealed Penal Code, shall be credited in accordance with the provisions of this section.
History —July 22, 1974, No. 116, Part 1, p. 501, § 17; July 10, 1978, No. 21, p. 420, § 1; June 4, 1980, No. 102, p. 331, § 1; July 20, 1989, No. 27, p. 93, § 3; Nov. 30, 1989, No. 7, p. 552, § 1; Sept. 15, 2004, No. 315, § 5; July 27, 2009, No. 44, § 2; Dec. 29, 2009, No. 208, § 1.