N.J. Stat. § 18A:66-78
In the event that the board of trustees of the teachers' pension and annuity fund shall determine to purchase group insurance coverage for the additional death benefit coverage, each member selecting the additional death benefit coverage shall agree to the deduction of a percentage of his compensation determined from a schedule of contributions to be established by the board of trustees of the teachers' pension and annuity fund. The schedule of contributions shall be established by said board of trustees on a basis it deems appropriate and shall be subject to adjustment by said board of trustees from time to time for the purpose of maintaining the contributory group insurance premium fund at a level sufficient to meet the obligations of the fund for the cost of the insurance.
N.J.S. § 18A:66-78