It's controlled at MMC relative to the [X,Y,Z] datum reference frame, RFS relative to the datum reference frame and RFS relative to the [T] datum reference frame.
There is no allowance for "overriding" a tolerance requirement. A tolerance may end up not being meaningful or useful, but that is a separate evaluation that, in this case, would require information about the relation between the referenced datum features.
If the position tolerance of the right-hand hole is 3.0mm, would the tolerance zone in relation to datum T, then be a circle of 3.0mmm? Where would it's center be? what is throwing me off is the datum is on the edge of the hole.