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
Low urinary creatinine levels. 1910.1027
The biological monitoring requirements under the Final Rule for Lead. 1926.62, 1910.1025
Fit testing and fit factors for the N-95 respirators for protection against TB exposure. 1910.134
OSHA Asbestos Standard. 1910.1001
Training requirements for class II roofing work. 1926.1101
Hazard Communications Standard. 1910.1200
Ramps: guarding and means of access to a higher elevation. 1910.23, 1926.1051
The situations under which dry cleaning establishments would be covered by the bloodborne pathogens standard 1910.1030
Minimum approach distances 1910.269, 1910.333
Clarification of Section 1910.268 Telecommunications. 1910.27, 1910.268
An interpretation on respirator use under the Interim Final Rule for Lead in Construction.
Clarification of Occupational Safety and Health Administration (OSHA) regulations. 1910.269
Errors in 29 CFR 1910.1000, Tables Z-1 and Z-3. 1910.1000
Baseline audiograms. 1910.95
Minimum number of dive team members required to support scuba diving. 1910.410, 1910.422, 1910.424
The requirement for change rooms whenever employees are required to wear personal protective clothing. 1910.120, 1910.141
Component evaluation and UL's MOU Third Party Test Data Program. 1910.7
Building and/or facility owner notification requirements. 1910.1001, 1926.1101
The coverage of the Hazard Communications Standard (HCS) to crude oil, natural gas, and natural gas condensate. 1910.1200
The requirements of a building owner for conducting a survey and the labeling of asbestos materials under the OSHA asbestos standard. 1910.1001