N.C. Gen. Stat. § 169-9

A sandbox participant must retain comprehensive records, documents, and data produced in the ordinary course of business regarding an innovative product or service tested in the regulatory sandbox for a period not less than five years after the conclusion of the period of the testing or for the period required pursuant to the record retention policy for the applicable State agency. The records shall be available to the applicable State agency upon prior written request. The applicable State agency shall establish reporting requirements for each sandbox participant, including information about consumer complaints, if any.