29 C.F.R. § 1904.4
(a) Basic requirement. Each employer required by this part to keep records of fatalities, injuries, and illnesses must record each fatality, injury and illness that:
(b) Implementation—(1) What sections of this rule describe recording criteria for recording work-related injuries and illnesses? The table below indicates which sections of the rule address each topic.
(2) How do I decide whether a particular injury or illness is recordable? The decision tree for recording work-related injuries and illnesses below shows the steps involved in making this determination.

[66 FR 6122, Jan. 19, 2001, as amended at 81 FR 91809, Dec. 19, 2016; 82 FR 20548, May 3, 2017]