Standard Interpretations

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.

1904.6 - Clarification of the terms most authoritative and pre-existing conditions as used for recordkeeping purposes. - 02/25/2011
1904.6 - Clarification on most authoritative when multiple medical opinions are provided. - 09/24/2010
1904.6 - Determining if an injury is considered a new recordkeeping case based on a recurrence of previously recorded symptoms. - 12/21/2005
1904.6 - Determining work-relatedness when the work event or exposure is only one of the discernable causes; not the sole or predominant cause. - 01/13/2004
1904.6 - Evaluation of seven scenarios for work-relatedness and recordkeeping requirements. - 01/15/2004
1904.6(a) - Determination of the date of an injury or illness for OSHA recordkeeping purposes. - 11/30/2004
1904.6(b)(3) - Clarification of the terms most authoritative and pre-existing conditions as used for recordkeeping purposes. - 02/25/2011

OSH Act - Section 5(a)(1)