A person who has been convicted of a disorderly persons offense or a petty disorderly persons offense may be sentenced to imprisonment for a definite term which shall be fixed by the court and shall not exceed 6 months in the case of a disorderly persons offense or 30 days in the case of a petty disorderly persons offense.
http://www.njlaws.com/2c-43-8.html?id=3200%20.a=
http://www.njlaws.com/2c-43-8.html?id=3200%20.a=