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

Filters


Date Title Standard Number
Medical and First Aid standards. 1926.50
Clarification of electric power generators, transmission and distribution standard 1910.269
Process Safety Management - Threshold quantity is determined on the amount of HHC in the process. 1910.119
OSHA's policy for inspections related to the Process Safety Management standard. 1910.119
The coverage of household products in a small group home. 1910.1200
The necessity for the standard and the standard's requirements, as well as other pertinent regulations. 1910.1030
Process Safety Management of highly hazardous chemicals - parts cleaning station involving flammable liquids. 1910.119
Order of testing for permit spaces. 1910.146
Respirator use of spray operations involving paints containing isocyanates. 1910.134
The Process Safety Management (PSM) of Highly Hazardous Chemicals (HHC) standard. 1910.119
Fall protection during steel erection activities.
Rollover protective structures for the Cary-Lift model. 1910 - Table of Contents
Management and supervisors' training required in paragraph (e)(4) of the standard. 1910.120
Control of Hazardous Energy (Lockout/Tagout) standard. 1910.147
HHC's as it applies to wood digestion process containing multiple toxic and flammable liquid HHCs. 1910.119
Carbon Monoxide or High Temperature Alarm Requirement for Portable Breathing Air Compressors. 1910.134(i)(7)
Appropriate quality standards for PPE. 1910.1030
State approval of a State occupational safety and health program.
HHC's as it applies to employer obligation to obtain and evaluate information regarding the contract employer's safety performance and programs 1910.119
Key to open locked exits. 1910.36