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
Maintenance of material safety data sheets(MSDS) and the written hazard communication program. 1910.1020, 1910.1200
Material safety data sheet requirement of the Hazard Communication Standard. 1910.1200
Application of OSHA's final standard for Hazardous Waste Operations and Emergency Response. 1910.120, 1910.120(b), 1910.120(c), 1910.120(d), 1910.120(e), 1910.120(f), 1910.120(h), 1910.120(i), 1910.120(j), 1910.120(k), 1910.120(l), 1910.120(m), 1910.120(n), 1910.120(o), 1910.120(a), 1910.120(q)(5), 1910.120(q)(11), 1910.38
Labeling requirements of the Hazard Communication Standard. 1910.1200(f)
Compressed Gas Cylinder Valve Protector 1910.253(b)(1)(iv)
Fall protection requirements for employees working over water. 1926.1431(k)(10)(i)
Hazard Communication Standard. 1910.1200
Requirements for downstream transmission of material safety data sheets (MSDSs). 1910.1200(g)
Interpretation of Blood Test Parameters Under the Benzene Standard 1910.1028(i), 1910.1028 App C
Clarification of the term "approved". 1926.152, 1926.32
Policy concerning OSHA's Hearing Conservation Amendment 1910.95
Hazard Communication Standard (HCS) Labeling Requirements for Industrial Thermometers 1910.1200
The hazard warning labels attached to shipments of solder. 1910.1200
Clarification of the label requirements of the OSHA Hazard Communication Standard (HCS). 1910.1200(f)
First Aid. 1910.151(c), 1926.50
Review of Policy on Section 4(b)(1) of the Act 1975.1
Labeling and material safety data sheet requirements under the Hazard Communication Standard. 1910.1200
Use of a "Negative Air Bag" in the removal of asbestos pipe insulation. 1926.58(e)(6)
Training certification requirements for 1910.120, Hazardous Waste Operations and Emergency Response. 1910.120
"HIV (AIDS virus)" Labeled Disinfectants