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
Requirements for downstream transmission of material safety data sheets (MSDSs). 1910.1200(g)
Interpretation of Blood Test Parameters Under the Benzene Standard 1910.1028(i), 1910.1028 App C
Clarification of the term "approved". 1926.152, 1926.32
Policy concerning OSHA's Hearing Conservation Amendment 1910.95
Hazard Communication Standard (HCS) Labeling Requirements for Industrial Thermometers 1910.1200
Clarification of the label requirements of the OSHA Hazard Communication Standard (HCS). 1910.1200(f)
The hazard warning labels attached to shipments of solder. 1910.1200
First Aid. 1910.151(c), 1926.50
Review of Policy on Section 4(b)(1) of the Act 1975.1
Labeling and material safety data sheet requirements under the Hazard Communication Standard. 1910.1200
Use of a "Negative Air Bag" in the removal of asbestos pipe insulation. 1926.58(e)(6)
Training certification requirements for 1910.120, Hazardous Waste Operations and Emergency Response. 1910.120
"HIV (AIDS virus)" Labeled Disinfectants
Sampling Procedures for Employees Using Air-Supplied Respirators 1910.134
Clarification concerning the relationship of several paragraphs within the 1910.120 Standard. 1910.120
Application of the Hazard Communication Standard to prescription drug products. 1910.1200
Application of CPL 2-2.44A to products claiming effectiveness against AIDS virus.
Jurisdiction and health risks for airport baggage x-ray scanning units and walk-through metal detectors. 1975.1
Seat belts for passengers in the rear of pickup trucks. 1926.601
Regulating employee exposure to wood dust 1910.1000