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.

Filters


Date Title Standard Number
The proper recording of a case for OSHA injury and illness recordkeeping purposes. 1904 - Table of Contents
Variance request. 1910.107, 1910.107(h), 1910.107(h)(2), 1910.107(h)(6), 1910.107(h)(8), 1910.399
OSHA Injury and Illness Recordkeeping Requirements. 1904 - Table of Contents
Request for interpretation of Hazard Communication Standard (HCS). 1910.1200
Clarification on the time allowed for completion of the initial process hazard analysis (PHA) as it may apply to a hypothetical case involving four different work sites of an employer. 1910.119
PRCS interpretation concerning a hydropower dam's 22 foot diameter sluice tunnel. 1910.146
Requesting clarification of Slings 1910.184
(OSHA) tuberculosis (TB) requirements.
Review of Variance Request Number 2276 1910.1002, 1905.11
The size of fire extinguisher for contruction equipment. 1910.157
The size of fire extinguisher for construction equipment. 1910.157, 1926.150, 1926 Subpart F
Handrail and railing clearance for runways (hangar catwalks). 1910.23(e)(6)
OSHA enforcement of Safety and Health requirements which apply to bungee jumping from cranes. 1926.550(g), 1975.3
Request for a permanent variance and an interim order regarding pressure vessel safety valve configuration. 1905.11, 1910.261
Request for a permanent variance and interim order. 1905.11, 1910.261
Scissor lift use requirements.
Clarification concerning the Electric Power Generation, Transmission, and Distribution standard. 1910.147
Compliance determination by OSHA concerning the use of radio-frequency-activated pagers for meeting the requirements of Employee alarm systems. 1910.165
Clarification of the use of powered industrial trucks in Class I, Division 2, Group C locations. 1910.178
The determination of medical treatment of OSHA injury and illness recordkeeping purposes. 1904 - Table of Contents