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
1910.177 does not apply to truck tires designated "LT". 1
Testing of video display units (VDUs) and the determination of the quality of VDU work environments. 0
Hazard Communication Standard inspections 1
Interpretation of the Hazard Communication standard as it applies to mixtures. 1
Safety requirements applicable to lunch and rest breaks during an employee's workday 0
At-home transfilling of portable oxygen cylinders by patients. 1
Interpretation of 1910.1043(h)(ii)(c) 1
Standard for exposure to tetrahydrofuran; Respirators may be worn only if engineering and administrative controls are not feasible. 2
Application of the Hazard Communication standard to a nuisance particulate. 1
Coverage of steel, aluminum, and other metals under the Hazard Communication Standard. 1
Maintaining MSDSs on a computer data base. 8
Safety and health standards pertaining to the electrical trades. 1
Conformation of labeling requirements of the Hazard Communication Standard 2
Use of life vests by stevedores to prevent drowning on barges. 0
Applicability of Section 1910.106 to Chemicals Plants. 1
Preparing a Material Safety Data Sheet under the trade secret provisions of the Hazard Communication Standard. 1
Response to request for variance from 1910.242(b) 1
OSHA standards for foot protection. 1
Inspection procedures for the Hazard Communication Standard. 1
Facial hair in the face sealing area is unacceptable. 3