The organisation proposing the project is responsible for undertaking a survey of the law relevant to the project and to the data processing and business processes it gives rise to. All participating organisations should do the same in connection with their involvement in the project.
Professionals with relevant expertise should be consulted as part of checking compliance with privacy law and other legal obligations. If your organisation has an in-house compliance unit or established compliance process, it might be useful to ensure that the compliance checking process takes full account of privacy law obligations and adds to the compliance checking process if necessary.