CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS (parts 5 to 36) > PART 35—FIRE-RESISTANT HYDRAULIC FLUIDS > SUBPART B—Test Requirements (§35.20 to §35.23) > 35.23—Performance required for certification.