Letters of Interpretation

OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed.

Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.

These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.

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Date Title Standard Number Standard Number
Labeling requirements for Diatomaceous Earth 1 1910.1200
Car Dealership Accident 1 1904 - Table of Contents
Speed-Sensing Machine Guards 1 1910.212
The Requirements of Submitting OSHA's Recordkeeping Forms to the United States Department of Labor/OSHA 5 1904.32, 1904.35, 1904.40, 1904.41, 1904.42
Enforcement Policy for Citing General Duty Clause instead of 29 CFR 1910.68 for Grandfathered Manlifts 1 1910.68
Clarification of OSHA training requirements for basic first aid and cardiopulmonary resuscitation (CPR). 6 1910.151, 1910.146, 1910.266, 1910.269, 1910.410, 1926.950
Clarification on the use of a tagout device when an energy isolating device is capable of being locked out. 1 1910.147
Hooking and Unhooking Loads with a Helicopter During Work on Electric Transmission Systems 4 1910.183, 1910.269, 1926.551, 1926 Subpart V
Requirements for watertight longitudinal bulkheads on crane barges. 3 1926.1437, 1926.1437(n)(7)(ii), 1926.1437(m)(5)
Definition of multi-employer worksite 0
Hazard communication of ammonia gas from new fuel additive in diesel trucks 1 1910.1200
Applicability of the Bloodborne Pathogens standard during transection of the umbilical cord. 5 1910.1030, 1910.1030(c)(2), 1910.1030(c)(1)(v), 1910.1030(d)(2)(i), 1910.1030(g)(2)(vii)(F)
Protecting Trainers of Killer Whales 0
Steel-toed Safety Shoes for Diabetics 2 1910.132, 1910.136
HAZWOPER standard's requirements for medical surveillance and training 1 1910.120
Acceptability of using a ramp to unload parts from a semi-trailer. 2 1926.501, 1926.501(b)(6)
Temporary Enforcement Policy for Proximity Alarm and Insulating Link Use with Cranes and Derricks in Construction. 5 1926.1401, 1926.1407, 1926.1408, 1926.1409, 1926.1410
Clarification on whether a forklift equipped with a designated forklift boom would be considered a crane. 2 1926.1400, 1926.1400(a)(1)
Schools that fulfill the training requirements for fire brigade members 1 1910.156
Proof testing of lifting beams used to lift wind turbine components. 2 1926.251, 1926.251(a)(4)