1.The competent authority of each Member State shall communicate the information referred to in Article 1(1) to the competent authority of any other Member State concerned, in any of the following circumstances:
(a)the competent authority of one Member State has grounds for supposing that there may be a loss of tax in the other Member State;
(b)a person liable to tax obtains a reduction in, or an exemption from, tax in one Member State which would give rise to an increase in tax or to liability to tax in the other Member State;
(c)business dealings between a person liable to tax in one Member State and a person liable to tax in the other Member State are conducted through one or more countries in such a way that a saving in tax may result in one or the other Member State or in both;
(d)the competent authority of a Member State has grounds for supposing that a saving of tax may result from artificial transfers of profits within groups of enterprises;
(e)information forwarded to one Member State by the competent authority of the other Member State has enabled information to be obtained which may be relevant in assessing liability to tax in the latter Member State.
2.The competent authorities of each Member State may communicate, by spontaneous exchange, to the competent authorities of the other Member States any information of which they are aware and which may be useful to the competent authorities of the other Member States.