• the principle of non discrimination in liberalization of trade within the Organization for  European Economic Cooperation.

4. The transitional period shall begin on the date of the establishment of the common market  and shall end five years after the establishment of the common market in coal.

5. Upon the entry into force of the Treaty in accordance with Article 99, the provisions  thereof shall apply subject to the derogations allowed by this Convention and without  prejudice to the supplementary provisions contained in this Convention for the ends set out  above.

Save where this Convention expressly provides otherwise, these derogations and  supplementary provisions shall cease to apply, and measures taken to implement them shall  cease to have effect, at the end of the transitional period.

PART ONE

Implementation of the Treaty

CHAPTER 1

SETTING UP OF THE INSTITUTIONS OF THE COMMUNITY

The Commission

Article 2

1. The Commission shall take office upon the appointment of its Members.

2. In order to perform the tasks assigned to it by Article 1 of this Convention, the Commission  shall exercise forthwith the information and study functions assigned to it by the Treaty, in the  manner and with the powers provided in Articles 46, 47 and 48 and the third paragraph of  Article 54. Once the Commission has taken office, the governments shall notify it in  accordance with Article 67 of any action liable to have repercussions on conditions of  competition, and in accordance with Article 75 of any provisions in trade agreements or  arrangements having similar effect where these relate to coal and steel.

On the basis of information obtained concerning facilities existing and planned, the  Commission shall determine the date from which the provisions of Article 54 other than those  referred to in the preceding subparagraph shall apply to investment programmes and to  projects already in process of execution on that date. The penultimate paragraph of Article 54  shall not apply, however, to projects for which orders were placed before 1 March 1951.

Once the Commission has taken office, it shall exercise where necessary, in consultation with  the governments, the powers provided in Article 59( 3 ).

It shall not exercise the other functions assigned to it by the Treaty until the opening date of  the transitional period for each of the products in question.

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