Pre-existing condition and/or specific event/exposure grey areas.
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. This 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. To keep apprised of such developments, you can consult OSHA's website at https://www.osha.gov.
April 24, 1992
Mr. Bradford L. Brown
Maine Department of Labor
Bureau of Labor Standards
Research and Statistics Division
State House Station # 45
Augusta, Maine 04333-0045
Dear Mr. Brown: