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.

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Date Title Standard Number Standard Number
Application of OSHA PEL for nitric oxide as 8-hr TWA to pregnant employees. 6 1910.1000, 1910.1200, 1910.1200(e), 1910.1200(f), 1910.1200(g), 1910.1200(h)
Applicability of the PRCS standard to aircraft maintenance activities. 5 1910.146, 1910.146(c)(4), 1910.146(c)(9), 1910.146(d), 1910.146(d)(5)
Clarification of specialty footwear and employer requirements to provide at no cost to its employees. 2 1910.132, 1910.132(h)(2)
Clarification on when administering oxygen would result in a recordable injury 3 1904 - Table of Contents, 1904.4(a), 1904.5(b)(5)(ii)(B)
Determining if a fatality would be considered work-related 2 1904 - Table of Contents, 1904.5(b)(1)
Applicability of 29 CFR 1926 to oil and gas well driling and servicing operations 0
Employers using digital radiography must continue to comply with the OSHA standard on ionizing radiation. 1 1910.1096
Whether a multiple lift of pre-cast concrete members is permissible. 4 1926.550(a)(19), 1926.704(e), 1926.753, 1926.753(e)
Management of Organizational Change 1 1910.119
Clarification of the term self-inflicted as used in the Recordkeeping standard 3 1904 - Table of Contents, 1904.5, 1904.7
Determining work-relatedness for injuries in the home when telecommuting 4 1904 - Table of Contents, 1904.4(b)(7), 1904.30(b)(3), 1904.46(3)
Counting restricted days for a part-time employee 2 1904 - Table of Contents, 1904.7
Payment for static dissipative safety-toe footwear for working with flammable liquids and products. 2 1910.132, 1910.132(h)(2)
Consider revising the annual training requirements of the general industry Asbestos standard 1 1910.1001
Removing ladders during trenching activities; compliance with 29 CFR 1926.651(c)(2). 1 1926.651(c)(2)
Payment for body belts, positioning straps, and pole and tree climbers. 10 1910.132(h)(2), 1910.132(h)(3), 1910.132(h)(4), 1910.132(h)(5), 1910.132(h)(6), 1910.268(g), 1910.269(g), 1910.269(g)(2), 1910.269(g)(2)(v), 1926.951(b)
Fall protection requirements for employees on construction equipment. 2 1926.500(b)(2), 1926.501(b)(1)
The use of cable hook assemblies, pole grip assemblies, or adjustable levelers on fiberglass extension ladders used in construction. 7 1926.1053(b)(1), 1926.1053(b)(3), 1926.1053(b)(6), 1926.1053(b)(7), 1926.1053(b)(9), 1926.1053(b)(10), 1926 Subpart X
Whether electric hand tools disassembled and deemed irreparable by a tool repair service are required to be returned disassembled. 6 1926.20(b)(3), 1926.302, 1926.302(a)(1), 1926.403, 1926.403(a), 1926.449
Payment for body belts, positioning straps, and pole and tree climbers. 10 1910.132(h)(2), 1910.132(h)(3), 1910.132(h)(4), 1910.132(h)(5), 1910.132(h)(6), 1910.268(g), 1910.269(g), 1910.269(g)(2), 1910.269(g)(2)(v), 1926.951(b)