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
Use of electronic signature pad to record signatures for training certification. 1910 - Table of Contents, 1915 - Table of Contents, 1917 - Table of Contents, 1918 - Table of Contents, 1926 - Table of Contents, 1928 - Table of Contents, 1960 - Table of Contents
Abbrasive blast cleaning nozzles must be equipped with a "dead-man" control. 1910.244(b)
Training required for commercial divers. 1910.410
Compliance with PSM and ANSI/ISA-S84.01 for safety instrumented systems 1910.119(d)(3), 1910.119(f)(1)(iv), 1910.119(j)
Lockout/tagout: preferred means of energy isolation; non cord-and-plug powered equipment. 1910.147(a)(2)(iii)(A), 1910.147(c)(3), 1910.269(m), 1910.333(b)
OSHA's proposed safety and health program rule; safety incentives.
Process Safety Management (PSM) applicability to liquid petroleum gas (LPG) bottle filling process. 1910.119(a)
Tunnel illumination requirements. 1926.56(a), 1926.800(g)(4), 1926.800(l)(2)
Disposal methods for blood collection tubes. 1910.1030(d)(4)(iii)(B), 1910.1030(g)(1)(i)
Clarification of training requirements for supervisory and managerial personnel under 1910.269. 1910.269(a)(2)
HBV antibody testing is required after vaccination series;HBV booster not required. 1910.1030(f)(1)(i), 1910.1030(f)(2)(v)
Applicability of 1910.178 to earth moving equipment and skid steer loaders. 1910.178(a)
Restricted work activity concept hinges on employee's ability to work. 1904.2
Employer who directs work activities is responsible for injury and illness recordkeeping. 1904.2
Recordable hours and injuries for truck drivers should reflect work-related exposures. 1904.2, 1904.12
OSHA does not prohibit reducing bonuses based on accidents. 1904.2
Removal of lockout devices by persons other than those who applied them. 1910.147(e)(3)
Fall protection, training, inspection and design requirements of aerial lifts and scissor lifts/scaffolds. 1926.450(b), 1926.451, 1926.451(e), 1926.451(f)(3), 1926.451(g), 1926.451(g)(1)(vii), 1926.452(b)(1), 1926.452(b)(2), 1926.452(b)(3), 1926.452(w), 1926.453, 1926.453(b)(2)(v), 1926.454, 1926.454(c), 1926.502
Use of roof jacks (slide guards) for residential and commercial construction. 1926.501(b)(13), 1926.502(k)
Applicability of Subpart L and Subpart X to stair towers used for access to multistory buildings. 1926 Subpart L, 1926 Subpart X