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.

NOTICE:

How to Request a Letter of Interpretation

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Date Title Standard Number
MSDS requirements for scrap materials 1910.1200(g)
Compliance with 1910.147 using the new Block-Out safety product line. 1910.147
Separate line for a full body harness 1910.27
Favorable Review Commission Decision. 1910.1020
Emergency response in the trucking industry 1910.120, 1910.1200, 1910.120(q)(1), 1910.120(q)(3)(vii), 1910.120(q)(3)(iv), 1910.120(q)(6), 1910.38, 1910.1200(h)
Location of excessive temperature sensors in the grain industry 1910.272
Favorable Review Commission Decision. 1915.73(d)
Bolt-together, divided wheels are not considered multi-piece rim wheels 1910.177
Use of X-Pac as an explosion suppression system 1910.272
Non-finishing spraying of contact cement to wood or to laminae 1910.107
Occupational noise exposure limits 1910.95(a)
Jurisdictional Issue - Southwest Transportation. 1975.1
Clarification of approval requirements for equipment to classify underground construction operations as potentially gassy 1910.7, 1926.800(h)
The Standards do not exclude equipments by weight of the machine for rollover protective structure. 1926.602, 1926.1000
Issuing OSHA Form 72's for Defective Gear Found Aboard Vessels 1919.11, 1918.12
Information on Robotics, Presence Sensing Devices, Ergonomics, and Hand Speed Criteria 1910.217
The point of operation and rotating part hazards related to vertical food mixers in bakeries and restaurants are covered by the Occupational Safety and Health Administration standards. 1910.212(a)(1), 1910.212(a)(3)(ii)
Enforcement of the Hazard Communication Standard as it relates to "vegetable oil mist" 1910.1200, 1910.1000 TABLE Z-1
Interpretation of the meaning of "Fixed Jacks" on trailers 1910.178, 1910.178(k)(3)
Favorable Review Commission Decision.