N.J. Stat. Ann. § 17:48C-7

7. Every contract made by any dental service corporation to provide payment for dental service shall provide for the payment for dental service for a period of 12 months or less, and no contract shall be made providing for the inception of such services at a date later than one year after the actual date of the making of such contract. Any such contract may provide that it shall be automatically renewed from year to year unless there shall have been 90 days' prior written notice of termination by either the subscriber or the corporation. No contract between the corporation and a subscriber shall provide for payment for dental services for more than one person, except that a family contract may provide that payment will be made for dental services rendered to a subscriber, or covered dependents, or both.