N.C. Gen. Stat. § 95-25.12

No employer is required to provide vacation pay plans for employees. However, if an employer provides these promised benefits for employees, the employer shall give all vacation time off or payment in lieu of time off in accordance with the company policy or practice. Employees shall be notified in accordance with G.S. 95-25.13 of any policy or practice which requires or results in loss or forfeiture of vacation time or pay. Employees not so notified are not subject to such loss or forfeiture.