...
The limited immunity provided in this subsection shall apply only if the person claiming immunity provides written verification that a needle, syringe, or other injection supplies were obtained from a needle and hypodermic syringe exchange program established pursuant to this section. In addition to any other applicable immunity or limitation on civil liability, a law enforcement officer who, acting on good faith, arrests or charges a person who is thereafter determined to be entitled to immunity from prosecution under this section shall not be subject to civil liability for the arrest or filing of charges.
N.C. Gen. Stat. § 90-113.27