Punishment for a contempt specified in section 2A:15-56 of this title may be by fine, not exceeding $100, or by imprisonment not exceeding 15 days, in the jail of the county where the court is sitting, or both, in the discretion of the court; provided, however, that this limitation shall not apply to any contempt conviction based on violations committed by a defendant subsequent to his initial conviction for violating any provision of the same injunction. Where a person is committed to jail, for the nonpayment of such a fine, he must be discharged at the expiration of 15 days; but where he is also committed for a definite time, the 15 days must be computed from the expiration of the definite time.
N.J.S. § 2A:15-57