N.C. Gen. Stat. § 163-165.10
The county board of elections shall make available for each precinct voting place an adequate quantity of official ballots or equipment. When the board of county commissioners has decided to adopt and purchase or lease a voting system for voting places under the provisions of G.S.165-165.8 [G.S.163-165.8], the board of county commissioners shall, as soon as practical, provide for each of those voting places sufficient equipment of the approved voting system in complete working order. If it is impractical to furnish each voting place with the equipment of the approved voting system, that which has been obtained may be placed in voting places chosen by the county board of elections. In that case, the county board of elections shall choose the voting places and allocate the equipment in a way that as nearly as practicable provides equal access to the voting system for each voter. The county board of elections shall appoint as many voting system custodians as may be necessary for the proper preparation of the system for each election and for its maintenance, storage, and care. The Executive Director of the State Board of Elections may permit a county board of elections to provide more than one type of voting system in a precinct, but only upon a finding that doing so is necessary to comply with federal or State law.
N.C. Gen. Stat. § 163-165.10