This summary is not the rule. The rule text controls.
Here's a plain English summary of this rule:
At least four Commissioners need to be present before the Commission can conduct official business. This is called a quorum, and it's the minimum number needed to move forward with decisions.
Once four or more Commissioners are present, the group can take action by a simple majority vote of whoever is in the room. This means not every Commissioner needs to agree, and not all of them even need to be present. As long as the quorum requirement is met, a majority of those attending can approve or reject an action.
This rule matters because it keeps the Commission running smoothly. It prevents a small handful of people from making decisions on behalf of the whole group, while also making sure the Commission doesn't get stuck waiting for every single member to show up before it can act.