What if, once a project is financed, the Ethics Committee of one center does not approve the study?

If possible, try to address the issues that were raised and led to the rejection, so that you fully comply with the requirements of the Ethics Committee and file again. If it is clear that you cannot get approval for that center, you have to adjust your workplan and recruit from different centers. In any case you cannot start any project activity without ethics approval. Nike Ambassador VIII 8