N.C. Gen. Stat. § 128-33

Subject to the provisions of Article 2 of Chapter 135 of Volume 17 of the General Statutes, as amended, no other provision of law in any other statute which provides wholly or partly at the expense of any county, city or town for pensions or retirement benefits for employees of the said county, city or town, their widows, or other dependents shall apply to members or beneficiaries of the Retirement System established by this Article.