How are athletics world records ratified?
A performance is not a record until it is ratified by the governing body, and a surprising number of apparently record-breaking runs never are.
The main conditions for a track and field record:
An approved venue and equipment. The track must be certified, and implements — shot, javelin, discus — must be weighed and measured, then checked again afterwards.
Fully automatic timing. Hand timing is not accepted for records in sprint events. Times are recorded to hundredths, and rounded up — a 9.998 is recorded as 10.00, never down.
Wind assistance below the legal limit. For sprints up to 200m, horizontal jumps and the sprint hurdles, a tailwind exceeding 2.0 metres per second invalidates the performance for record purposes. The wind gauge reading is taken over a specified measurement period. This is why performances are annotated w for wind-assisted, and why some of the fastest times ever run are not records.
Note that the limit applies only to events where wind materially helps. The 400m and longer have no wind limit, because a runner goes round the bend and the effect largely cancels.
Doping control. The athlete must provide a sample, typically immediately. Refusal or absence invalidates the record.
Proper officiating and documentation, submitted by the national federation.
Altitude is permitted and is not disqualifying — which is why records set at high altitude, notably at the 1968 Mexico City Olympics, stood for decades despite the thinner air aiding sprints and jumps while hindering distance events.
Shoe technology has become a live issue, and World Athletics introduced rules limiting sole thickness and the number of embedded plates after a wave of records.
Road running records have additional requirements: course measurement by a certified measurer, limits on how much the course may drop in elevation and on the separation between start and finish, which prevents point-to-point downhill courses qualifying.