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
Continued enforcement of Lockout/Tagout Standard 1910.147
Requirements relating to the operation of a two-spindle reaming/drilling/threading machine in a set-up mode. 1910.145, 1910.147, 1910.212, 1910.303
Article in Magazine Containing Incorrect Information About Lockout/Tagout Requirements. 1910.147
Lockout/Tagout for circuit breaker blocking and locking devices. 1910.147
Motor starter circuits and energy isolation devices 1910.147
Confirmation on lockout/tagout, specifically with the standard covering periodic inspections. 1910.147
Lockout/Tagout with regards to the cleanup and sanitizing of machinery and equipment in the meatpacking industry. 1910.147
Regulations requiring bus maintenance facilities to use safety stands when maintenance personnel are working under buses which have been raised by in-ground or portable vehicle hoists. 1910.147
Interpretation of 1910.147, related to floating fish processors. 1910.147
Whether or not OSHA Standard 1910.147, lockout/tagout would apply to motor vehicles. 1910.147
Work permits in lockout/tagout standard requirements 1910.147
Compliance with 1910.147 using the new Block-Out safety product line. 1910.147
The obligations and responsibilities of machine manufacturers under the lockout/tagout standard. 1910.147, 1910.147(c)(2)(iii)
Control of Hazardous Energy Sources (Group Lockout/Tagout). 1910.147(f)(3), 1910.333(b)(2)
Lockout/Tagout-Corrugated Metal Industry. 1910.147
Control of Hazardous Energy Sources Lockout/Tagout. 1910.147
Guarding of machinery in bowling centers. 1910.147, 1910.212
Concerning the new lockout/tagout standard. 1910.147
Control of Hazardous Energy Sources (lockout/tagout). 1910.147