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
Ventilation requirements for the auto and printing industries. 1910.94, 1910.106, 1910.107, 1910.124, 1910.125(d)(2)
Clarification of medical removal protection benefits in the lead standard. 1910.1025
Standard applicable to control of dust explosions in powdered milk production. 1910.22, 1910.301
Lifting capacity on mechanical material handling equipment may not be changed without the manufacturer's prior written approval. 1910.178(a)(4)
Requirements for hangers for two-point suspension scaffolds. 1926.451(i)(2)
Position on MSDS format for compliance with the Hazard Communication standard. 1910.1200
Clarification of the term "clip" as used in the last sentence of the subject ANSI reference. 1926.700
Fast response noise dosimetry measurement not acceptable. 1910.95
Facial hair and the wearing of respirators. 1910.134
Evaluation of X-rays and pulmonary function tests for early diagnosis of lung disease. 1910.1001, 1926.1101
The use of negative-pressure air-purifying respirators for protection against paint spray containing isocyanates.
Organic lead soap containing lead naphthenate is regulated under the lead standard. 1910.1025
Federal employees' rights and reprisal protection in relation to filing safety and health complaints. 1960 - Table of Contents
OSHA/NRC Interface Activities and Related Information 1910.1096
Clarification of OSHA Instruction STD 11-11.2B as it pertains to the lifting of personnel with a jib crane. 1926.550
Requirements for fire brigade instructors.; Requirements for fire brigade instructors. 1910.156, 1910.157
Review of the QNX, Incorporated EverX sign.
Use of an electronic back-up mirror used with a with a reverse audible alarm. 1926.602(a)(9)
American Red Cross Standard First Aid Modular System 1910.151(b)
Review of Medic First Aid Program 1910.151(b)