(1) Subject to subsection (2), where the Revenue Commissioners are satisfied that 2 or more persons established in the State, at least one of whom is a accountable person, are closely bound by financial, economic and organisational links and it seems necessary or appropriate to them for the purpose of efficient and effective administration (including collection) of the tax to do so, then, for the purpose of this Act, the Commissioners may, whether following an application on behalf of those persons or otherwise -

(a) by notice in writing (in this section referred to as a "group notification") to each of those persons deem them to be a single accountable person (in this section referred to as a "group"), and the persons so notified shall then be regarded as being in the group for as long as this subsection applies to them, but section 65 shall apply in respect of each of the members of the group, and -

(i) one of those persons, who shall be notified accordingly by the Commissioners, shall be responsible for complying with this Act in respect of the group, and

(ii) all rights and obligations arising under this Act in respect of the transactions of the group shall be determined accordingly,

and