In South Africa, according to Section 23: Labour Relations in the Constitution, Every Worker has the right to join a trade union. All employees including Management who are not involved in hiring and firing Can become Union members.
The only limitation for a manager joining is That they cannot stand for Shop steward elections .
The specific labour laws regarding trade unions are:
1. Every worker has the right to form and join a trade union and to participate in the union’s activities
2. Every worker has the right to strike
3. Every employer has the right to form and join an employers’ organisation and to participate in the activities of the organisation
4. Every trade union, employers’ organisation and employer has the right to engage in collective bargaining
5. Everyone has the right to fair labour practices