N.C. Gen. Stat. § 115C-509

Before any election is called to enlarge a city administrative unit, if any school property is located in the area proposed to be consolidated with the city administrative unit, the board of education of such city administrative unit and the board of education of the county administrative unit concerned shall agree with each other as to the school property to be conveyed and transferred to the board of education of the city administrative unit if a majority of the voters voting in the election vote in favor of such enlargement. And, if such enlargement is authorized by such election, the board of education of the county administrative unit shall, within 10 days after July 1 next following such election, convey and transfer to the board of education of the city administrative unit the property so agreed to be conveyed and transferred.