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
Warning stickers on stump grinders. 1926.200
Duties of a "construction manager" on a multi-employer worksite.
Compliance and Enforcement Activities affected by the PELs Decision. 1910.1000, 1910.1000 TABLE Z-1, 1910.1000 TABLE Z-2, 1910.1000 TABLE Z-3
Post-emergency response and medical surveillance requirements of HAZWOPER 1910.120
Permit-Required Confined Spaces for General Industry. 1910.146
Effect termination of employment has on the count of lost workdays for recordkeeping purposes. 1904 - Table of Contents
When orthopedic devices constitute medical treatment for recordkeeping purposes. 1904 - Table of Contents
Recording restricted work activity on the OSHA 200 Log. 1904 - Table of Contents
Conflict between requirements of 1910.252 and 1910.146 1910.252, 1910.146
Minnesota administers its own occupational Safety & Health Program. 1910.120
Use of the Racal "Breath-Easy 6" powered air purifying respirator with beards. 1910.134(g)(1)(i)
Definition of Potentially Gassy Atmosphere. 1926.800
Permissibility of a consent form with a waiver of liability. 1910.1030, 1910.1030(g)(2)(vii)(I)
Minimum length that an excavation must be before a protective system is required. 1926.652(a)
Flammable and Combustible Liquid standard. 1910.106
Location and maintenance of OSHA injury and illness records for employees working at off-site locations. 1904 - Table of Contents
Work performed in conjunction with insulated enclosures. 1910.146
Head protection standard. 1910.135
Positioning hooks on concrete formwork.
Reverse signal alarms for motor vehicles. 1926.601(b)(4)(i)