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
Clarification Regarding the Requirements of 29 CFR 1910.147 1910.147, 1910.147(c)(5)(ii), 1910.333(b)(2)
Lockout/Tagout (LOTO) Feasibility and "Alternative Methods" 1910.147, 1910.147(f)(1), 1910.147(e)(2), 1910.147(e)(3), 1910.147(d)
Inspection Guidance for Animal Slaughtering and Processing Establishments 1903.8, 1904, 1910 Subpart E, 1910.95, 1910.111, 1910.119, 1910.132, 1910.141, 1910.147, 1910.212, 1910.1000, 1910.1200, 1913.10
Group Lockout/Tagout 1910.147(f)(3)
Cathodic Protection and the Utilization of Metallic Bonding to Control Hazardous Energy 1910.147 - Index
Energy Isolation Device Requirements 1910.147(b)
Trip and Emergency Switches on Mills and Calenders 1910.216, 1910.212(a)(3)(iv)(e), 1910.212(a)(3)(iv)(i), 1910.216(e), 1910.216(f)(1), 1910.216(f)(2), 1910.216(f)(3), 1910.147
Group Lockout or Tagout 1910.147(f)(3)
Inspection Guidance for Poultry Slaughtering and Poultry Processing Establishments 1904 - Table of Contents, 1910 Subpart E, 1910.95, 1910.119, 1910.132, 1910.141, 1910.147, 1910.212, 1910.1200, 1913.10
Lockout/tagout of electrical hazards by workers who install, maintain, repair or replace premises wiring systems. 1910.147(a), 1910.147(c), 1910.147(f), 1910.333(b), 1910.333(c)
Lockout/tagout requirements during maintenance of front-end loaders (Jeff Wilke/DEP/GIE/Harvey/26485) 1910.147 - Index, 1910.147(c)(7)
Electronic Certification of Training 1910.147, 1915 - Table of Contents, 1917 - Table of Contents, 1918 - Table of Contents, 1926 - Table of Contents, 1928 - Table of Contents, 1960 - Table of Contents
Whether an LED type device ca be used for the isolation and deenergization verification requirements of 1910.147 and 1910.333. 1910.147, 1910.147(a)(1)(i), 1910.147(a)(1)(ii)(D), 1910.147(d)(2), 1910.147(d)(3), 1910.147(d)(4), 1910.147(d)(5), 1910.147(d)(6), 1910.333, 1910.333(b), 1910.333(b)(2), 1910.333(b)(2)(iii)(D), 1910.333(b)(2)(iv)(B)
Clarification on the use of a tagout device when an energy isolating device is capable of being locked out. 1910.147
Controlling Confined Space Hazards in Deep Tanks for Parts Cleaning 1910.146, 1910.147
Application of Lockout/Tagout to Employees Performing Maintenance Tasks on Cord and Plug Equipment 1910.147
Use of local valves as a means of equipment isolation for energy control. 1910.147
Numerous questions on lockout/tagout under 1910.147 and 1910.269 1910.269, 1910.147
Numerous questions on lockout/tagout under 1910.147 and Subpart S. 1910.147
OSHA Training Standards Policy Statements 1910.134(k), 1910.147(c), 1910.1030(g), 1910.1200(h), 1926.21