Letters of Interpretation | Occupational Safety and Health Administration

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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How to Request a Letter of Interpretation

Date	Title	Standard Number
07/28/1994	HAZWOPER refresher training requirements.	1910.120
07/26/1994	OSHA Policy Regarding Voluntary Rescue Activities.	1903.14(f)
07/26/1994	Wire rope clips in conjunction with wedge sockets.	1926.800
07/26/1994	Medical and First Aid standards.	1926.50
07/26/1994	Clarification of the Control of Hazardous Energy (Lockout/Tagout) Standard.	1910.147
07/18/1994	Clarification of electric power generators, transmission and distribution standard	1910.269
07/18/1994	Process Safety Management - Threshold quantity is determined on the amount of HHC in the process.	1910.119
07/18/1994	OSHA's policy for inspections related to the Process Safety Management standard.	1910.119
07/15/1994	Process Safety Management of highly hazardous chemicals - parts cleaning station involving flammable liquids.	1910.119
07/15/1994	The coverage of household products in a small group home.	1910.1200
07/15/1994	The necessity for the standard and the standard's requirements, as well as other pertinent regulations.	1910.1030
07/13/1994	Order of testing for permit spaces.	1910.146
07/11/1994	The Process Safety Management (PSM) of Highly Hazardous Chemicals (HHC) standard.	1910.119
07/11/1994	Respirator use of spray operations involving paints containing isocyanates.	1910.134
07/08/1994	Fall protection during steel erection activities.
07/08/1994	Rollover protective structures for the Cary-Lift model.	1910 - Table of Contents
07/07/1994	Control of Hazardous Energy (Lockout/Tagout) standard.	1910.147
07/07/1994	Management and supervisors' training required in paragraph (e)(4) of the standard.	1910.120
07/07/1994	HHC's as it applies to wood digestion process containing multiple toxic and flammable liquid HHCs.	1910.119
07/05/1994	Carbon Monoxide or High Temperature Alarm Requirement for Portable Breathing Air Compressors.	1910.134(i)(7)