In your view it is not clear how the concentric elements are defined. Concentricity of an axis has to be defined by the diameter which defines the axis. I am not sure if is possible here anyway because some holes are round and some are oblong. But I would accept it like shown below.The positional tolerance of the upper hole is not necessary because it is B. It will always be 0.000.The concentricity below needs a datum. I guess this is what you wanted to define, isn´t it?