The Director, upon application, issues all licenses including, but not limited to, licenses that are required to be obtained pursuant to these rules, and may refuse to issue or renew the license of any person who is in violation of N.J.S.A. 54:39-101 et seq., and 56:6-1 et seq., or upon sufficient cause being shown.
N.J. Admin. Code § 18:18-2.3