Letters of Interpretation

Lapse in Appropriations

For workplace safety and health, please call 800-321-6742; for mine safety and health, please call 800-746-1553; for Job Corps, please call 800-733-5627 and for Wage and Hour, please call 866-487-9243 (866-4-US-WAGE).  This website is currently not being updated due to the suspension of Federal government services. The last update to the site was 10/1/2025.  Updates to the site will start again when the Federal government resumes operations.

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

Date	Title	Standard Number
08/11/1994	Permit-required confined spaces.	1910.146
08/11/1994	Requirements for emergency eyewash stations in retail autoparts stores	1910.132, 1910.133, 1910.151, 1910.303, 1910.307
08/11/1994	Construction vs. Maintenance.	1926.32, 1910.12
08/08/1994	Process Safety Management of Highly Hazardous Chemicals standard as it may apply to the batch chemical processes.	1910.119
08/08/1994	Wedge Sockets Wire Rope Clips (Piggy-Back Clip).	1926.800
08/08/1994	Permit space entry	1910.146, 1910.268, 1910.269
08/08/1994	A crane may be used for rated load testing of below-the-hook lifting device provided the test does not exceed 125% for the crane's rated load.	1910.179
08/05/1994	Authorized employees and periodic lockout/tagout inspections.	1910.147
08/05/1994	The list of hazardous chemicals are required under 1910.1200.	1910.1200
08/04/1994	Training material for first aid and CPR training.	1910.151
08/04/1994	Clarifications of the OSHA standards, 29 CFR 1910.109 and 29 CFR 1910.119.	1910.109, 1910.119
08/04/1994	Requirement for safety nets for steel erection.	1926.105(a)
08/02/1994	OSHA Regulation 1910.1030 and the Applicability to Electric Utilities.	1910.1030
08/01/1994	A review of the publication "Safety News" as it relates to the OSHA regulation 1910.1030.	1910.1030
08/01/1994	Clarification of the policy for classifying violations as repeated, as well as clarification of specific regulations.	1910.95
08/01/1994	Recording of an illness involving lost workdays.	1904 - Table of Contents
07/28/1994	HAZWOPER refresher training requirements.	1910.120
07/26/1994	Clarification of the Control of Hazardous Energy (Lockout/Tagout) Standard.	1910.147
07/26/1994	Wire rope clips in conjunction with wedge sockets.	1926.800
07/26/1994	Medical and First Aid standards.	1926.50

Lapse in Appropriations

Letters of Interpretation

NOTICE:

Filters