New Jersey Statutes Title 12. Commerce and Navigation 12 § 7-58

a. A person who has been convicted of violating section 3 of P.L.1952, c. 157 (C. 12:7-46), and who has been imprisoned in a county jail or workhouse in the county in which the offense was committed, shall not be released after commitment until the term of imprisonment imposed has been served.  A person imprisoned in the county jail or workhouse may, at the discretion of the court, be released on a work release program.

b. A warden or other officer having custody of the county jail or workhouse shall not release a person until the sentence has been served, except that a person may be released by the court on a work release program.  A person sentenced to an inpatient rehabilitation program may be released by the court, upon the petition of the treating agency, to an outpatient rehabilitation program for the duration of the original sentence.

c. This section shall not be construed to interfere in any way with the operation of a writ of habeas corpus, a proceeding in lieu of the prerogative writ, or an appeal.