N.J. Admin. Code § 13:46-23.7
No person, partnership, firm, corporation or association licensed by the Office of the State Athletic Commissioner to hold or conduct boxing bouts, wrestling exhibitions or sparring exhibitions pursuant to 13:46-4.1, nor any person or entity holding an interest in said licensee of the nature described in 13:46-23.2, nor the spouse, child, parent or sibling of any such individual, shall serve or act as the manager or second for a licensed athlete or shall have any direct or indirect financial interest in any manager's or second's contract with any athlete licensed by the Office of the State Athletic Commissioner or in any assignment thereof unless such interest is disclosed in a writing sent by regular or certified mail or hand delivered to the Office of the State Athletic Commissioner, Richard J. Hughes Justice Complex, Trenton, New Jersey, at least 10 days prior to the time of the authorized event.
N.J. Admin. Code § 13:46-23.7