N.J. Stat. § 30:6C-9
Nothing herein contained shall be deemed to restrict the use of the writ of habeas corpus. If a writ of habeas corpus is obtained on behalf of any person confined in a hospital or facility who is receiving treatment for a substance use disorder involving drugs, and if it appears at the hearing on the return of the writ that the condition of the person is such as to require further treatment for a substance use disorder involving drugs, then the person shall be remanded to the care and custody of a hospital or facility until such time as it appears that the person is no longer in need of institutional care or treatment for a substance use disorder involving drugs as provided in P.L. 1964, c.226 (C.30:6C-1 et seq.) and may properly be discharged.
N.J.S. § 30:6C-9