N.J. Admin. Code § 11:5-7.6
No licensee shall directly or indirectly take any punitive or retaliatory action against any other licensee(s) where such action is based upon the failure or refusal to adhere or to adopt any commission. No licensee shall adopt a discriminatory commission split against another broker because of such other broker's failure or refusal to adhere to or adopt any commission; if a listing broker varies his commission split policy with any selling broker on a cooperative sale, the listing broker shall maintain a file at his place of business which shall contain in writing an explanation for the variation and which reflects who made the decision and why it was made. Nothing in this section shall prohibit a listing broker from varying his commission split policy with respect to any one or more selling brokers in order to achieve equality of commission splits with such other selling broker or brokers in connection with their commission split policy with such listing broker.
N.J. Admin. Code § 11:5-7.6
See: 13 New Jersey Register 306(a), 13 New Jersey Register 440(c).