Final answer:
A subcontractor must report a human trafficking contract violation to appropriate authorities immediately. This is both a legal obligation and a moral imperative to prevent further harm and bring justice to the victims.
Step-by-step explanation:
If a subcontractor identifies a human trafficking contract violation, the action that must be taken is to report it to appropriate authorities. It is a serious legal and moral responsibility to ensure that such violations are not ignored. Increasing the workload of affected workers or continuing business as usual are not just unethical options; they are also illegal and could lead to severe penalties for all parties involved. Reporting promptly can help to prevent further abuses and bring justice to the victims. It is essential for subcontractors to know the proper channels for reporting, which may include law enforcement agencies, human rights organizations, or internal reporting mechanisms within the company.