1. Only the following may be members of a grouping:

(a) companies or firms within the meaning of the second paragraph of Article 58 of the Treaty and other legal bodies governed by public or private law, which have been formed in accordance with the law of a Member State and which have their registered or statutory office and central adminsitration in the Community; where, under the law of a Member State, a company, firm or other legal body is not obliged to have a registered or statutory office, it shall be sufficient for such a company, firm or other legal body to have its central administration in the Community;

(b) natural persons who carry on any industrial, commercial, craft or agricultural activity or who provide professional or other services in the Community.

2. A grouping must comprise at least:

(a) two companies, firms or other legal bodies, within the meaning of paragraph 1, which have their central administrations in different Member States, or

(b) two natural persons, within the meaning of paragraph 1, who carry on their principal activities in different Member States, or

(c) a company, firm or other legal body within the meaning of paragraph 1 and a natural person, of which the first has its central administration in one Member State and the second carries on his principal activity in another Member State.