c. by systematically and progressively abolishing all such qualifying periods and  other restrictions provided for either under national legislation or under  agreements previously concluded between Member States as imposed on  workers of other Member States conditions regarding the free choice of  employment other than those imposed on workers of the State concerned;  
d. by setting up appropriate machinery to bring offers of employment into touch  with applications for employment and to facilitate the achievement of a balance  between supply and demand in the employment market in such a way as to  avoid serious threats to the standard of living and level of employment in the  various regions and industries.

Article 50

Member States shall, within the framework of a joint programme, encourage the  exchange of young workers.

Article 51

The Council shall, acting unanimously on a proposal from the Commission, adopt  such measures in the field of social security as are necessary to provide freedom of  movement for workers; to this end, it shall make arrangements to secure for migrant  workers and their dependants:
a. aggregation, for the purpose of acquiring and retaining the right to benefit and of  calculating the amount of benefit, of all periods taken into account under the  laws of the several countries;

b. payment of benefits to persons resident in the territories of Member States.

CHAPTER 2

RIGHT OF ESTABLISHMENT

Article 52

Within the framework of the provisions set out below, restrictions on the freedom of  establishment of nationals of a Member State in the territory of another Member  State shall be abolished by progressive stages in the course of the transitional  period. Such progressive abolition shall also apply to restrictions on the setting up  of agencies, branches or subsidiaries by nationals of any Member State established  in the territory of any Member State.

Freedom of establishment shall include the right to take up and pursue activities as  self employed persons and to set up and manage undertakings, in particular  companies or firms within the meaning of the second paragraph of Article 58, under  the conditions laid down for its own nationals by the law of the country where such  establishment is effected, subject to the provisions of the Chapter relating to capital.

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