N.C. Gen. Stat. § 135-114
Only for the purpose of determining eligibility for benefits accruing under this Article, membership service standing to the credit of a member of the Legislative Retirement System or the Consolidated Judicial Retirement System shall be added to the membership service standing to the credit of a member of the Teachers' and State Employees' Retirement System. However, in the event that a participant or beneficiary is a retired member of the Legislative Retirement System or the Consolidated Judicial Retirement System whose retirement benefit was suspended upon entrance into membership in the Teachers' and State Employees' Retirement System, such membership service standing to the credit of the retired member prior to retirement shall be likewise counted. Membership service under this section shall not be counted twice for the same period of time.
N.C. Gen. Stat. § 135-114