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

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Date Title Standard Number
Final rule on process safety management of highly hazardous chemicals, formaldehyde 1910.119
Supervisor/management 8-hour training and the 8-hour refresher training. 1910.120
Fall protection for workers engaged in steel erection. 1926.105
ROPS requirements for industrial tractors with backhoe attachments. 1926.1000, 1926.602
Bloodborne Pathogen standard's applicability to first aid providers for employees who accidentally rupture a sewage line. 1910.1030
The use of head protection at construction sites. 1926.100
Bloodborne pathogens as it relates to home health care agencies. 1910.1030
Farming Appropriations Rider 1928.1
Coverage of child care workers under scope of occupational exposure to bloodborne pathogens. 1910.1030
Refresher training and HAZWOPER. 1910.120
OSHA's Hazardous Waste Operations and Emergency Response final rule. 1910.120
Bloodborne pathogen standard's application to persons who perform first aid. 1910.1030
Operating backhoes and mobile equipment. 1926.550(a)(15)
The use of ladders and fall protection by steel erectors. 1926.1051(a)
Marking of vehicles transporting explosives. 1926.902(h)
CTD cases involving positive EMG results, etc. 1904 - Table of Contents
Cellulose nitrate and the PSM Standard. 1910.119
Recording occupational exposure to Hepatitis B and HIV. 1904 - Table of Contents
Eyewash and shower equipment in construction. 1910.151
OSHA regulates vermin control at permanent places of employment and at temporary labor camps. 1910.141(a)(5), 1910.142(j)