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
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)
"HIV (AIDS virus)" Labeled Disinfectants
Training certification requirements for 1910.120, Hazardous Waste Operations and Emergency Response. 1910.120
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
Interpretation of the HCS as it relates to laboratories and requirements with respect MSDSs. 1910.1200
Distribution of Penalties Collected on Violation-by-Violation Cases.
Criteria for inclusion of workers in a medical surveillance program and training under 1910.120. 1910.120(f), 1910.120(l)(3)
Oven inspections required by 1910.263(l)(9)(ii) and definitions of "Protecting Devices" and "Safety Devices". 1910.263(l)(9)(ii), 1910.263(l)(9)(i)
Hansen Quick Disconnect Couplings -- Evaluation for Compliance 1915.55(f)(5), 1917.152(d)(3)(iv)
Rollover protective structures. 1926.1000
24 hour training required for employers covered by 1910.120(a)(1) (i), (ii), and (iv). 1910.120(l)(3)
Personnel platform attached directly to a boom. 1926.451, 1926.556
Safety railings. 1926.750