N.J. Stat. § 39:3-10.16
The director, in his discretion, may refuse to grant a commercial driver license to a person who is, in his estimation, not a proper person to be granted such a license, but no defect of the applicant shall bar him from receiving a license unless it can be shown by tests approved by the director that the defect incapacitates him from safely operating a commercial motor vehicle.
The director may suspend or revoke a license to operate a commercial motor vehicle, may prohibit a person from obtaining such a license, or may suspend or revoke the reciprocity privilege of a person for a violation of any provision of Title 39 of the Revised Statutes or for any other reasonable grounds, after due notice in writing of such proposed suspension, revocation, or prohibition and the grounds thereof.
N.J.S. § 39:3-10.16