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
Material safety data sheets (MSDSs) under the Hazard Communication Standard. 1910.1200
Adjusting cotton dust permissible exposure limits (PELs) for extended work shifts. 1910.1043
Training for 1910.120 to be specific to responder's needs. 1910.120, 1910.121
Information from (OSHA) Pamphlet 3000. 1903.14, 1903.20
Employee exposure to consumer products. 1910.1200
Clarification of the "Occupational Exposure to Hazardous Chemicals in Laboratories" regulations regarding a Physician's written opinion 1910.1450
Hazwoper does not require training for employees not involved or exposed to hazardous waste areas. 1910.120
HCS applicability to hazardous by-products such as Ozone- generating operations 1910.1200(b)(1)
Intermittent stabilization system building anchors and components for powered platforms for exterior building maintenance. 1910.66
Intermittent stabilization system building anchors and components for powered platforms for exterior building maintenance. 1910.66
The type and quantity of rescue equipment that is required and whether a provision for outside rescue teams can be used in conjunction with an in-house rescue plan. 1910.272
"Laboratory setting" and subsequent requirements for Hazwoper. 1910.120, 1910.1200
Inspection conducted by OSHA at the Greater Pittsburg Internation Airport. FAA Jurisdiction 1975.1
Definitions of Hazwoper terms including immediate, incidental & uncontrolled release. 1910.120
Payment for cost of hepatitis B vaccine screening tests.
Communication Standard (HCS) to hydrotreated refined oils. 1910.1200
Litigation relative to the severance of a hand by a high school student while using a radial arm saw. 1910.213(h)
Container labeling requirements under the OSHA Hazard Communication Standard 1910.1200(f)
First responders, training, hazardous materials technician, etc. 1910.120, 1910.120(q)(6)(ii), 1910.120(q)(6)(iii)
Lockout/Tagout-Corrugated Metal Industry. 1910.147