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.

Filters


Date Title Standard Number
Minimum number of dive team members required to support scuba diving. 1910.410, 1910.422, 1910.424
Building and/or facility owner notification requirements. 1910.1001, 1926.1101
The requirements of a building owner for conducting a survey and the labeling of asbestos materials under the OSHA asbestos standard. 1910.1001
The coverage of the Hazard Communications Standard (HCS) to crude oil, natural gas, and natural gas condensate. 1910.1200
The activation of hoisting or dumping devices on haulage vehicles used in the construction industry. 1926.601
Classification of saliva in dental procedures under the bloodborne pathogens standard. 1910.1030
OSHA's policy regarding the use of scaffolds as fall arrest system anchors. 1926.502
Standards and regulations applicable in the U.S. for sale, import, handling, and transportation of various chemicals. 1910.1200
Third party certification for the Astro-Press 1000 control system. 1910.217
The coverage of the OSHA injury and illness recordkeeping requirements. 1904 - Table of Contents
The proper recording of several cases. 1904 - Table of Contents
The recordability of a particular illness case on the OSHA No.200. 1904 - Table of Contents
An interpretation concerning OSHA recordkeeping requirements as applied to sheltered workshops. 1904 - Table of Contents
Requesting a clarification of 29 CFR 1910.178 (k)(1). 1910.178
Guidance in determining whether certain spaces would be considered confined spaces. 1910.146
Safety electrical work practices; motor disconnects;work clearances. 1905 - Table of Contents, 1910.11, 1910.303(g)(1), 1910.305(j)(4), 1910.333(a)(1)
Clarification of the Process Safety Management of Highly Hazardous Chemicals Standard. 1910.106, 1910.119
Applicable regulations and design calculation factors which can be used for tanks and vessels. 1910.106
The OSHA interpretation of respiratory protection requirements with regards to tuberculosis (TB) exposure. 1910.134, 1910.134(d), 1910.134(f)
Contractors and the criteria for applying the Construction Work Standard. 1910 - Table of Contents, 1910.12, 1926 - Table of Contents