13. Exploitation by Government or authorized person 14. Non-voluntary Licences 15. Invalidation PART II—UTILITY MODEL CERTIFICATES 16. Applicability of provisions relating to patents 17. Special provisions relating to utility model certificates 18. Conversion of patent applications or applications for utility model certificates PART III—INTERNATIONAL APPLICATIONS UNDER THE TREATY 19. Filing date and effects of international application designating Ghana 20. Patent Office as receiving office 21. Filing of international applications 22. Patent Office as designated office 23. Patent Office as elected office 24. National processing 25. Entering national phase 26. Failure to enter national phase 27. Harare Protocol 28. Processing international applications in accordance with the Treaty 29. Changes in ownership; licence contracts 30. Representation 31. Patent Registry 32. Register 33. Corrections of errors