5. Without prejudice to Article 17, Member States shall ensure that, in the event of any subsequent insolvency of the debtor, transactions that are reasonable and immediately necessary for the implementation of a restructuring plan, and that are carried out in accordance with the restructuring plan confirmed by a judicial or administrative authority, are not declared void, voidable or unenforceable on the ground that such transactions are detrimental to the general body of creditors, unless other additional grounds laid down by national law are present.