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
Hazard Communication Standard as it applies to wholesalers and distributors of hazardous chemicals. 1910.1200
Fire equipment training requirements. 1910.157, 1910.157(a), 1910.157(b), 1910.38, 1910.39
Labeling of Formaldehyde-Containing Products Under the Hazard Communication Standard 1910.1200(f)
Testing requirements for the power units or manually operated winches of single-point adjustable suspension scaffolds. 1910.28, 1926.451
Clarification of OSHA's regulations formerly codified at 1518.751(c)(i), now 29 CFR 1926,751 (c)(2). 1926.751
Clarification of 1926.451(c) concerning the intermingling of tube and coupler scaffold components. 1926.451
Applicability of 29 CFR 1926.451(a)(4). 1926.451
The Willson "type 3" eye protective device complies with ANSI Z87. 1-1968. 1910.133(b)(2)
Clarification of service braking system requirements for rubber- tire off-highway equipment. 1926.602(a)(4)
Clarification of our scaffold standards. 1926.451
Hair where the mask edges meet the skin is not permitted for wearers of 30 minute positive pressure SCBA respirators. 1910.134(g)(1)(i), 1910.134(g)(1)(ii), 1910.134(g)(1)(iii)
Requirements for listing multiple exposure limits on MSDSs under the HCS. 1910.1200
Explanation of HCS labeling requirements to the National Association of Printing Ink Manufacturers. 1910.1200(f)
Applicability of HCS standard to shipment of truck parts. 1910.1200
Labeling requirements for bulk shipments of metallic scrap under the HCS. 1910.1200(f), 1910.1200(f)(2)
The safe use of portable, compressed-air-actuated, fastener driving tools (staple guns) 1910.212, 1910.212(a)(3)(ii), 1910.242(a)
Professional liability insurance for asbestos abatement consultants. 1910.1001, 1926.1101
Establishing carcinogenicity of sodium and potassium salts of chromate and dichromate. 1910.1200(d)(4)
Sampling methods for ethylene oxide 1910.1047
Centrifugal safety switch for a concrete trowel machine is acceptable. 1926.702(c)