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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Date Title Standard Number
Definition of "statistically reliable measurements" in 1926.58(f) (4). 1926.58(f)(4)
Applicability of the HCS to manufacturers of steel coils. 1910.1200
Manually controlled top loading operations of tank vehicles. 1910.106(f)(3)(iii)
Fall protection for employees exposed to hazardous falls from roofs. 1910.66(e)(3), 1910.23, 1910.145(c)(3)
Access ladder for scaffolds. 1926.450
Cancer warning labels for formaldehyde and products containing formaldehyde 1910.1200(f)
Safe working load of ship's gear in union purchase 1918.51(a), 1918.51(b)
OSHA policy regarding medical surveillance requirements 1910.1025
Free audiometric testing for employees exposed over the action level. 1910.95
Grounding of a person in a wheelchair to eliminate static electricity.
Anchors required for two-point suspension scaffolds. 1910.28(g)(11), 1910.66(e)(2)
Guarding requirements for the "Speed Cut" radial saw. 1910.213(h)(1)
Advertisement on cleaning up mercury spills from glass thermometers 1910.1000
The use of "steel duck billed hammers". 1910.177
Safety hazard related to the use of contact lenses.
Medical surveillance requirements in the vinyl chloride standard. 1910.1017
The HCS's requirement for target organ effects on labels for shipped containers of hazardous chemicals. 1910.1200
Training requirements in the hazardous waste interim final rule, 1910.120(e)(2) and (3). 1910.120(e)(2), 1910.120(e)(3)
IARC listing of boot and shoe manufacturing and repair as an occupation associated with cancer in humans 1910.1200
Housing Construction Operations. 1926.501(b)(13)