The position tolerance controls the hole-to-hole location tolerances. What you have a pattern of cylindrical tolerance zones or boundaries located together at the basic dimensions. The axis of each as-built hole feature within the pattern must fall within these tolerance boundaries from the start to the end of the hole. The tolerance boundaries are applied at RFS (Regardless of Feature Size).
There should be some sort of separate location control for the hole pattern. Likely a limit tolerance tying one or more of the holes back to other features on the component or assembly.
To inspect, simply zero on one or more of the holes (doesn't matter which) to establish an implicit datum or datum reference then measure the locations of the other holes relative to that implied datum(s).