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
OSHA does not regulate the outer shipping container of hazardous material. 1910.1048
Requirement of name, address and telephone number on an MSDS. 1910.1200
FDA regulated drugs that pose a hazard would be covered by the HCS. 1910.1200
Location and maintenance of OSHA injury and illness records. 1904 - Table of Contents
Interpretation of the word "close". 1910.110(b)(14)(i)
Qualified employee requirements for the servicing and maintenance of electrical equipment. 1910.332(a), 1910.333(b), 1910.333(c)(2), 1910.334(c)(1)
Applicablility of the lockout/tagout standards. 1910.333, 1910.147, 1910.269
Processes involving flammable liquids and gases. 1910.119
Christmas Treeing.
Movement of compressed gas cylinders with regulators installed and "special truck" requirement 1910.253
Employee alarm systems. 1910.165(b)(5)
HHCs as it applies to Hydrogen Peroxide delivered from a tank truck. 1910.119
Safety standards for aerial work platforms.
Delivery of hydrogen peroxide, 52% by weight or greater. 1910.119
Requirement for additional employee training whenever new hazards are identified. 1910.1200
Secondary wire rope suspension systems. 1926.451(g)(3)(iv)
Solvents classified as a combustible liquid on the basis of the MSDS 1910.1200(d), 1910.1200(g)
Wiring, Extension Cords and Grounding. 1926.404(f)(3)(i)
Definitions for "near proximity" and "serious injury". 1910.151(b)
Lifting of two empty containers that are vertically coupled by twist locks. 1918.85, 1917.71