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
Labeling requirements with regard to containers of pesticides 1910.1200
MSDS required with initial shipment of chemicals used in humidification systems in office areas 1910.1200
Requirements for minimum illumination at construction sites. 1926.56
Program directive on de minimis violations.
Thomas E. Baca replacing Millicent Woods on the FACOSH.
Regarding labeling requirements of the OSHA's Hazard Communication Standard. 1910.1200
Favorable Review Commission Decision.
Favorable Decision in National Engineering & Contracting Co. and Meroe Contracting and Supply v. OSHA.
The posting of notices on the application of certain Federal laws. 1903.2
Favorable Supreme Court Decision.
Calendar stacks used in the pulp and paper industry 1910.261, 1910.212
Shielding of drive lines on pivotal sprinklers and an interpretation of the words "guarded by location". 1928.57
Implementation of a comprehensive chemical hygiene plan for lab operations 1910.1450
Time and resources needed to comply with Lab Standard is justifiable 1910.1450
Occupational exposure to psittacosis and OSHA's enforcement activity to protect exposed employees.
Rollover protective structures for material handling equipment 1926.1000
Extension Cords Connected to Permanent Wiring of a Construction Site Building 1926.404(b)(1)
Definition of Reasonable Diligence as stated in 1910.1096(d)(1). 1910.1096
Retesting when audiogram shows employees have suffered STS shift 1910.95(g)(7)(ii)
Self-centering controls will be required on overhead bridge and container handling gantry cranes only. 1917.45