14. Preparation of drawings 15. Identification of drawings 16. Descriptive matter 17. Drawings not to be creased 18. Drawings lodged with provisional specification PART IV EXAMINATION OF APPLICATIONS AND ACCEPTANCE OF COMPLETE SPECIFICATIONS 19. Examination procedure under section 16 20. Extension of time under section 20 Regulation 21. Extension of time under section 21 22. Publication of acceptance 23. Inspection of application, specification and drawings PART V OPPOSITION TO GRANT OF PATENT 24. Notice of opposition 25. Counter-statement 26. Filing of evidence by objector 27. Filing of evidence by applicant 28. Extension of time under regulations 25, 26 and 27 29. Proof of service of notices, statements, etc.