N.J. Stat. § 30:9-12.7
The admission of any person to a county hospital for other than mental illness established under this act shall be subject to the regulations established by the board of managers and on application in writing signed by the patient or a person interested in the admission of the patient by reason of relationship or marriage, or by a person having the charge or care of such patient, or by the sheriff, or by the municipal director of welfare or person charged with the care and relief of the poor, or by any chief of police or police captain in any municipality in the county where such person may be, or by the chief executive officer of any public or private charitable institution or hospital in which the patient may be. All application forms shall be approved by the board of managers for such hospital.
N.J.S. § 30:9-12.7