Observance of collective agreements in film and television productions?

for example:

Dumping of fees and remunerations
Infringements of the Working Hours Act (Arbeitszeitgesetz)
Undermining regulations in collective agreements
Reduction of social security contributions
Distortion of competition in the production landscape

The national association of film professional associations (Bundesvereinigung der Filmschaffendenverbände e.V.), which the bvft belongs to, provides a campaign for the observance of collective agreements (Aktion Tariftreue), that enables affected film sound professionals to report grievances anonymously. Members and other film sound professionals are called upon to report violations. There are transferred to the contract registration office of the national association.