Thanks for the clarification, Joe.
Now, all we need is more exact wording, e.g., "..one or more terminal bars for terminating all non-isolated grounding conductors shall be secured inside the cabinet." This would better represent the actual practice of using multiple terminal bars, as well as specify the apparent intent of landing ALL the non-isolated equipment grounding conductors at the terminal bar.
Anyone have easy access to a panelboard cover that has specific wording that EGC's have to land on the terminal bar? Or, does the wording just specify that the bar is provided for the EGC's (with no mandatory usage implied)?