N.C. Gen. Stat. § 8B-4: Notice of need for interpreter; proof of deafness.

A deaf person entitled to an interpreter under this Chapter shall, if practicable, notify the appropriate appointing authority of his need prior to his appearance. A failure to notify or to request an interpreter is not a waiver of the right to an interpreter. Before appointing an interpreter, an appointing authority may require satisfactory proof of the requesting person's deafness if he has reason to believe the person is not hearing impaired. (1981, c. 937, s. 1.)