Who is an 'injured State' in the law of international responsibility?

Article 42 of the ILC Articles on State Responsibility treats a State as injured if the obligation breached is owed "to that State individually", or to a group of States including it or to the international community as a whole and the breach "specially affects that State" or is of an interdependent kind. Other States may invoke responsibility under Article 48 for breaches of collective obligations, but they are not injured States merely because a peremptory norm was violated.