What 29 CFR 1904.32 requires (plain English)
29 CFR 1904.32 sets the year-end obligations for the OSHA 300-A annual summary. At the close of each calendar year, the employer must (1) review the 300 Log and correct any deficiencies, (2) create the 300-A summary of the year's injuries and illnesses, (3) certify the summary, and (4) post it.
The certification is a specific accountability requirement: a company executive (the owner, an officer, the highest-ranking company official at the site, or that official's immediate supervisor) must sign to certify that they examined the 300 Log and reasonably believe the summary is correct and complete. This pushes recordkeeping accuracy up to a senior level rather than leaving it with a clerk.
The 300-A must be posted where employee notices are customarily posted and kept in place, legible, from February 1 to April 30 of the year following the year covered. Even establishments with no recordable cases must complete and post a 300-A showing zeros. The summary is also the form electronically submitted to OSHA under §1904.41 by covered establishments.