Following the IAU Council meeting that took place on August 28th, 2022 in Berlin where list of records under ratification was presented as well as updates in the records guideline. The Record Regulation in Paragraph 2.2 was updated to clarify that World Age Group Records did not require 3 athletes to race in order to ratify the records. This was discussed and agreed with IAU Council.
The updated table with recent ratified records as well as updated guideline was issued by IAU Records Committee end of August 2022 and is available at IAU website in the Rankings & Records section.
You can access as well both documents in the links provided above.
On behalf of IAU Records Committee
IAU Director of Communication