The best approach to ensure global regulatory compliance when implementing a new business process is to ensure the appropriate involvement of the legal department. The legal department is the function that provides legal advice and guidance to the organization on various matters, such as contracts, transactions, disputes, regulations, and compliance. By involving the legal department in the implementation of a new business process, the organization can ensure that the business process complies with the relevant laws, policies, and standards that apply in different countries and jurisdictions. The legal department can also help to identify and mitigate any legal risks or issues that may arise from the new business process, such as liability, litigation, or sanctions.

The other options are not as effective as ensuring the appropriate involvement of the legal department for ensuring global regulatory compliance when implementing a new business process. Using a balanced scorecard to track the business process is a good practice for measuring and evaluating the performance and value of the business process, but it does not guarantee compliance with global regulations. Reviewing and revising the business architecture is a necessary step for designing and aligning the business process with the business strategy and objectives, but it does not address the legal aspects of the business process. Seeking approval from the change management board is a relevant procedure for implementing a new business process, but it does not ensure that the change management board has the expertise or authority to assess and approve the global regulatory compliance of the business process.