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 Standard Number
Hazard communication requirements for commercial ink cartridges 4 1910.1200(b)(6)(v), 1910.1200(f), 1910.1200(g), 1910.1200(h)
Requirement for Unknown Acute Toxicity Statement 1 1910.1200
QLFT fit testing procedures 2 1910.134, 1910.134 App A
29 CFR 1910.269 and 29 CFR Part 1926, Subpart V-Enforcement dates 7 1910.269, 1910.331, 1910.335, 1926.952, 1926.954, 1926.960, 1926.965
Clarification of the applicability of 29 CFR 1910.269 to line-clearance tree trimming 3 1910.269, 1910.331, 1910.335
29 CFR 1910.269 and 29 CFR Part 1926, Subpart V-Fall protection 5 1910.269, 1926.502, 1926.954, 1926.959, 1926.967
Veterinary clinic kneeling squatting 0
Requirements for Rails and Steps for Access to Semi-Trailers (Walking and working surfaces, motor vehicles, stairs) 1 1910.24
Clarification of the applicability of the recording criteria for cases occurring while traveling to from an airport for work-related travel. 2 1904 - Table of Contents, 1904.5(b)
Clarification regarding the applicability of the recording criteria involving restricted work. 2 1904 - Table of Contents, 1904.7
HBV and needlesticks in the textile industry 1 1910.1030(b)
Definition of secure for handling of compressed gases in containers 1 1910.101(b)
HCS classification and labeling requirements for products containing crystalline silica 3 1910.1200, 1910.1200(b)(2), 1910.1200(c)
Clarification regarding the jurisdiction of the applicability of the recording requirements in state territorial waters. 2 1904 - Table of Contents, 1904.3
Practical accommodation for the labeling of small packages under the Hazard Communication Standard (HCS) 2 1910.1200, 1910.1200(f)(1)
Use of multiple countries' information on labels of hazardous chemicals 4 1910.1200, 1910.1200(f)(1), 1910.1200(f)(2), 1910.1200(g)(1)
Asbestos medical surveillance requirements for class III work performed less than 30 days per year 2 1926.1101(h), 1926.1101(m)
HBV testing and vaccines, regulated medical waste, and sole proprietorship 3 1910.1030(f)(1), 1910.1030(f)(3)(iii), 1910.1030(d)(3)(xi)
Acceptable use of pictograms on chemical labels under the revised Hazard Communication standard 3 1910.1200(f)(1), 1910.1200(f)(1)(iv), 1910.1200 App C
The requirement for single or multiple SDSs 3 1910.1200(g)(1), 1910.1200(g)(2)(x), 1910.1200 App D