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CFR > Title 14 - Aeronautics and Space > CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION > SUBCHAPTER D—AIRMEN (parts 60 to 67) > PART 67—MEDICAL STANDARDS AND CERTIFICATION > SUBPART D—Third-Class Airman Medical Certificate (§67.301 to §67.315) > 67.315—Discretionary issuance.