ABSTRACT
Act No. 6356 on Trade Unions and Collective Agreements, like repealed Act No. 2821 on Trade Unions, adopted the industrial unionism as the compulsory basis for unionisation. The determination of the branch of activity in which the concerned workplace will be included is of particular importance in terms of the use of trade union freedoms. Nevertheless, uncertainties remain for defining boundries of the workplace concept. In addition, links with social security system may cause important problems in the implementation of legislative requirements. In this study, the different appearances of the industrial unionism in Act No. 6356 and the process of the determination of the branch of activity will be examined
Keywords : Act No. 6356 on Trade Unions and Collective Agreements, industry unionism, workplace, enterprise, main job, auxiliary job, determiantion of branch of activity