North Carolina General Statutes Chapter 163. Elections and Election Laws § 163-33.2. Chairman and county board to examine voting machines

Prior to each primary and general election the chairman and members of the county board of elections, in counties where voting machines are used, shall test vote, in a reasonable number of combinations, no less than ten percent (10%) of all voting machines programmed for each primary or election, such machines to be selected at random by the board after programming has been completed, and further, the board shall record the serial numbers of the machines test voted in the official minutes of the board. In the alternative, the board may cause the test voting required herein to be performed by persons qualified to program and test voting equipment.