What 29 CFR 1904.7 requires (plain English)
29 CFR 1904.7 defines the general recording criteria: once a case is work-related (§1904.5) and a new case (§1904.6), it becomes recordable if it results in any of a defined set of outcomes (death, days away from work, restricted work or transfer to another job, medical treatment beyond first aid, or loss of consciousness) or if it is a significant work-related injury or illness diagnosed by a physician or other licensed health care professional.
The rule then defines each outcome precisely. "Medical treatment beyond first aid" is defined by exclusion: §1904.7(b)(5)(ii) gives an exhaustive list of what counts as first aid (for example, non-prescription medication at non-prescription strength, tetanus shots, cleaning and bandaging, hot/cold therapy, temporary splints for transport). Any treatment not on that list is medical treatment, and the case is recordable. Days away and restricted-work days are counted in calendar days, and the combined count for a single case is capped at 180 days.
Because these criteria also drive the severity measures (the total recordable case rate and the DART (days away, restricted, or transferred) rate) 1904.7 is the section employers most often get wrong, usually by classifying medical treatment as first aid or by mishandling day counts. The criteria are objective, and the first-aid list, not the treater's opinion, controls.