59It is only in exceptional cases, such as that referred to in paragraph 53 above, in which it was established that it was impossible in practice for the EU institution concerned to state to the requisite legal standard the reasons for the disputed decision, that the statement of reasons may be supplemented by explanations provided by the author of the act during the proceedings. However, even in those rare cases, it is not automatic that the act which is insufficiently reasoned may be put in order by explanations provided after the bringing of the action. In view of the imbalance between the parties which late communication of the grounds of the contested measure is liable to create, the EU Courts must still ascertain, as the Advocate General observed in point 95 of his Opinion, whether the decision to accept, on an exceptional basis, the additional statement of reasons is not liable to infringe the rights of the defence. In that regard, it is incumbent on the Court to take into account the stage of the procedure at which the explanations were provided by the EU institution concerned and to ensure that the person concerned was actually able to respond to them.