Adds the following to GS 115C-12(23), which requires the State Board of Education (State Board) to adopt rules governing interscholastic athletic activities conducted by local boards of education, and authorizes the State Board to designate an organization to apply and enforce its rules governing participation in interscholastic activities at the high school levels. Requires an organization's written consent to the conduct of audits by the State Auditor in order for an organization to be designated by the State Board. Authorizes the State Auditor to conduct audits of any designated organization in the same manner as for State agencies pursuant to Article 5A of GS Chapter 147.