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
Clarification of the reporting requirements contained in 1904.39, regarding specific types of eye and tooth injuries. 1904 - Table of Contents, 1904.39
Hazard communication requirements for commercial ink cartridges 1910.1200(b)(6)(v), 1910.1200(f), 1910.1200(g), 1910.1200(h)
Requirement for Unknown Acute Toxicity Statement 1910.1200
QLFT fit testing procedures 1910.134, 1910.134 App A
Clarification of the applicability of 29 CFR 1910.269 to line-clearance tree trimming 1910.269, 1910.331, 1910.335
29 CFR 1910.269 and 29 CFR Part 1926, Subpart V-Enforcement dates 1910.269, 1910.331, 1910.335, 1926.952, 1926.954, 1926.960, 1926.965
29 CFR 1910.269 and 29 CFR Part 1926, Subpart V-Fall protection 1910.269, 1926.502, 1926.954, 1926.959, 1926.967
Requirements for Rails and Steps for Access to Semi-Trailers (Walking and working surfaces, motor vehicles, stairs) 1910.24
Veterinary clinic kneeling squatting
Clarification regarding the applicability of the recording criteria involving restricted work. 1904 - Table of Contents, 1904.7
Clarification of the applicability of the recording criteria for cases occurring while traveling to from an airport for work-related travel. 1904 - Table of Contents, 1904.5(b)
Definition of secure for handling of compressed gases in containers 1910.101(b)
HBV and needlesticks in the textile industry 1910.1030(b)
Clarification regarding the jurisdiction of the applicability of the recording requirements in state territorial waters. 1904 - Table of Contents, 1904.3
Asbestos medical surveillance requirements for class III work performed less than 30 days per year 1926.1101(h), 1926.1101(m)
HCS classification and labeling requirements for products containing crystalline silica 1910.1200, 1910.1200(b)(2), 1910.1200(c)
Use of multiple countries' information on labels of hazardous chemicals 1910.1200, 1910.1200(f)(1), 1910.1200(f)(2), 1910.1200(g)(1)
Practical accommodation for the labeling of small packages under the Hazard Communication Standard (HCS) 1910.1200, 1910.1200(f)(1)
HBV testing and vaccines, regulated medical waste, and sole proprietorship 1910.1030(f)(1), 1910.1030(f)(3)(iii), 1910.1030(d)(3)(xi)
The requirement for single or multiple SDSs 1910.1200(g)(1), 1910.1200(g)(2)(x), 1910.1200 App D