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

Filters


Date Title Standard Number Standard Number
The requirements for reporting safety data sheet (SDS) information under the Hazard Communication Standard 1 1910.1200
Respirator Requirements During Wet Abrasive Blasting 2 1910.94(a), 1926.57(f)
Lockout of tagout requirements for electrical hazards 1 1910.333(b)
Lockout/tagout of electrical hazards by workers who install, maintain, repair or replace premises wiring systems. 5 1910.147(a), 1910.147(c), 1910.147(f), 1910.333(b), 1910.333(c)
Hazard communication effective dates and labels 2 1910.1200(j), 1910.1200(f)
Hazard communication 2012-compliant labels and safety data sheets on shipped containers of hazardous chemicals 2 1910.1200(f)(6), 1910.1200(g)(6)(iv)
Hazard communication effective dates and SDSs 4 1910.1200(j), 1910.1200(g)(1), 1910.1200(g)(6)(iv), 1910.1200(g)(8)
Selecting protective clothing based on the IEEE National Electrical Safety Code, C-2, 2012, Table 410-1 5 1910.269(l)(8), 1910.269(l)(8)(ii), 1910.269(l)(8)(v), 1926.960(g)(2), 1926.960(g)(5)
Requirements for protective clothing and equipment in the Electric Power Generation, Transmission and Distribution Standard. 9 1910.269, 1910.269(l), 1910.269(l)(8), 1910.269 App E, 1926 Subpart V, 1926.960(g), 1926.960(g)(2), 1926.960(g)(5), 1926 Subpart V App E
Use of kinesiology tape is not considered medical treatment beyond first aid. 2 1904 - Table of Contents, 1904.7
Label requirements between CPSC and HCS 2012 and aerosol products 3 1910.1200(f)(1)(iv), 1910.1200 App B, 1910.1200 App C
HCS 2012 pictograms for aerosol air fresheners 3 1910.1200(f)(1)(iv), 1910.1200 App B, 1910.1200 App C
Requirements for the use of flexible cords and cables. 4 1910.305(g), 1910.305(g)(1)(i), 1910.305(g)(1)(ii), 1910.305(g)(1)(iv)
Lockout/tagout requirements during maintenance of front-end loaders (Jeff Wilke/DEP/GIE/Harvey/26485) 2 1910.147 - Index, 1910.147(c)(7)
Guarding energized electrical parts within cable trays (H.D. Roberts Jr/DEP/GIE/Harvey/26006) 7 1910.269 - Index, 1910.303 - Index, 1910.269(v), 1910.269(v)(4), 1910.303(h), 1910.303(g), 1910.303(g)(2)
NRTL approval is not required for non-electrical vacuum cleaners used in combustible dust atmospheres (Kim G. Feddersen/DEP/GIE/Harvey/26424) 1 1910.307 - Index
Definition of complex mixture 2 1910.1200, 1910.1200(g)(4)
Applicability of gas detector tubes under Hazard Communication 2012 2 1910.1200(b)(6)(v), 1910.1200(c)
Using non-electrical equipment in locations with hazardous atmospheres. 1 1910.307
Label requirements between CPSC and HCS 2012 and aerosol products 3 1910.1200(b)(5)(v), 1910.1200 App C, 1910.1200 App B