Bachrul Amiq, Ulul Albab, Hartoyo
In Indonesia, Trade Union was legally specified in Law No. 21 of 2000 regulating several provisions relating to the functions, roles, objectives and formation of trade unions. The role of trade unions as mediators between the interests of companies and workers is needed to create harmonious industrial relations. The advocacy for the implementation of Law No. 21 of 2000 concerning Trade Unions/Labor Unions is a series of mentoring in the form of recommendations, assistance, and statements for the interests of workers. The purpose of this study is to produce an advocacy determinant model of the implementation of Law No. 21 of 2000. By using the approach of normative and empirical juridical methods, the results showed that trade unions have played a role in advocacy for the establishment of trade unions, the creation of Collective Labor Agreements, work agreements, bipartite advocacy, tripartite advocacy and settlement of industrial relations disputes. The model revealed that the level of education, communication, openness, and infrastructure are elements that strengthen the advocacy of trade unions.