The ACBL Super Chart is authorized for use in all sessions of National championship events with no upper masterpoint limit (NABC+) when at least 12-board segments are played.
The ACBL Mid-Chart is authorized for use in:
• All NABC+ events
• All unrestricted Flight A regional-rated knockout events conducted at an NABC
• Any bracket of a bracketed knockout event at an NABC which contains no team with a bracket designator (average masterpoints for the entire team or the top two players) of less than 1500 masterpoints.
In all other events conducted at an NABC, unless otherwise specified, only conventions on the ACBL General Convention Chart are authorized. See Appendix A.