For enrollments occurring after May 21, 2010, multiple membership is prohibited. For enrollments occurring in some retirement systems on or before May 21, 2010, an employee may have been enrolled in the system on the basis of more than one position with more than one employer participating in the retirement system. Within the limits of the statute and board rules, such an employee was required to enroll for each position.
N.J. Admin. Code § 17:1-3.2