1. If an undertaking does not comply with Article 15, the competent authority of its home Member State may prohibit the free disposal of its assets after having communicated its intention to the competent authorities of the Member States in which the risks are situated.
2. For the purposes of restoring the financial situation of an undertaking the solvency margin of which has fallen below the minimum required under Article 16a, the competent authority of the home Member State shall require that a plan for the restoration of a sound financial situation be submitted for its approval.
In exceptional circumstances, if the competent authority is of the opinion that the financial situation of the undertaking will deteriorate further, it may also restrict or prohibit the free disposal of the undertaking's assets. It shall inform the authorities of other Member States within the territories of which the undertaking carries on business of any measures it has taken and the latter shall, at