N.C. Gen. Stat. § 122C-157

The area authority shall adopt and enforce a professional reimbursement policy. This policy shall (i) require that fees for the provision of services received directly under the supervision of the area authority shall be paid to the area authority, (ii) prohibit employees of the area authority from providing services on a private basis which require the use of the resources and facilities of the area authority, and (iii) provide that employees may not accept dual compensation and dual employment unless they have the written permission of the area authority.