N.C. Gen. Stat. § 44A-42

The lien conferred under this Article arises only when the owner acquires possession of the property stored in the self-service storage facility; and it shall terminate when the owner relinquishes possession of the property upon which the lien might be claimed, or when the occupant or any other person having a security or other interest in the property tenders prior to sale the amount of the rent, plus the expenses incurred by the owner for the preservation of the property. The reacquisition of possession of the property stored in the self-service storage facility, which was relinquished, shall not reinstate the lien.