Here is the list of most stringent regulatory authorities:
1. US FDA
2. EMA (European Union)
3. ANVISA (Brazil)
4. Health Canada
5. TGA (Australia)
6. PMDA (JApan)
7. SAHPRA (South Africa)
8. NPRA (Malaysia)
9. NPMA (China)
10. HSA (Singapore)
It may slightly vary based on the cGMP practice and clinical study requirements.