Letters of Interpretation | Occupational Safety and Health Administration

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

Date	Title	Standard Number
10/28/1987	Request for a variance from 1910.106.	1910.106
10/28/1987	Work Platforms suspended from Lattice or Hydraulic Crane Booms.	1926.550
10/26/1987	Labeling and MSDSs for a stump router cutter head which has carbide tips on the cutter teeth.	1910.1200(f), 1910.1200(g)
10/16/1987	A clarification of requirements for recirculating air discharged from spray operations.	1910.107
10/09/1987	Clarification of Material Safety Data Sheet Requirements Under the Hazard Communication Standard.	1910.1200
10/07/1987	Safeguarding of Metal Cutting Do-All Saw at the Norfolk Naval Shipyard.	1910.212
10/05/1987	Additional requirements for distributors from the August 24, 1987 expansion of the HCS.	1910.1200
10/01/1987	Appeal's court rules that modular housing assembly will be regulated as manufacturing.	1926 - Table of Contents
10/01/1987	Retention requirements for superseded MSDSs.	1910.1200(g)
09/26/1987	Lift Slab Construction.	1926.700
09/24/1987	Clarification of revised Subpart K, Electrical Standard for Construction, 1926.403(a).	1926.403(a)
09/24/1987	Cranes used to hoist and suspend employees on a work platform.
09/24/1987	Temporary lighting branch circuits.	1926.405, 1926.449
09/23/1987	Definition, application and use of "Horns".	1926.602
09/17/1987	Definitions of target organ and hazards of chemicals under the Hazard Communication Standard.	1910.1200
09/17/1987	Application of the Hazard Communication Standard to art materials industry.	1910.1200
09/15/1987	Respiratory protection compliance responsibility for contract workers and visitors.	1910.134
09/10/1987	National Paint and Coatings Association's (NPCA) Health Effects Labeling Approach	1910.1200
09/08/1987	Interim enforcement procedures for AIDS, Hepatitis B, and other blood-borne infectious diseases.	1910.132, 1910.22(a)(1), 1910.141(a)(4)(ii), 1910.145
09/08/1987	Responsibility for Material Safety Data Sheets (MSDS) Under the Hazard Communication Standard (HCS)	1910.1200