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
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
ILO Questionnaire concerning health and medical services
Employee evacuation in the event of imminent Natural Phenomenon. 1910.38, 1910.120, 1910.120(a)(1)(v), 1910.120(q)(1), 1910.120(q)(6)
Cost of training is the employer's responsibility. 1910.120, 1910.120(e)(6)
All mobile housing units without exception, must comply with the general provisions for 1910.142. 1910.142(b)(9)
Safety and health protection for city government. 1975.3
Review Commission Decisions. 1926.500(d)(1)
Lead-based paint removal technology 1910.1025, 1926.62
Guarding of protruding steel rods. 1926.7, 1926.500
Minimum number of hours required for awareness level for police officers 1910.120
Fires involving spills or releases of hazardous substances 1910.120
Boilermakers rebuilding an incinerator in a clean area at a Superfund site 1910.120, 1926.21
Maintaining Medical Records for Employees Subject to Medical Surveillance. 1910.120, 1910.1020, 1926.1101
Training requirements for emergency medical service personnel. 1910.120
Requirements for backrest extensions and overhead guards for powered industrial trucks. 1910.178
New electrical standards relating to sugar beet plant and sawmill 1910.331(c)(1)
Approval of extension cords by a NRTL. 1910.303(a), 1926.403(a)
Emergency response procedures for radioactive materials 1910.120, 1910.120(q)
Certifying employees as equivalently trained in hazardous waste operations 1910.120(e)(9)
The Hazard Communications Standard as it applies to employees who prepare and administer drugs/medications 1910.1200