To our knowledge, the International Association of Athletics Federation (IAAF) does not deliver an official certification for transponder timing systems used on road races.
However, the IAAF Competition Rules for 2018-2019, available for download at https://www.iaaf.org/about-iaaf/documents/rules-regulations, define in Rule 165 §24 a number of criteria for transponder systems used on road races and other events not held completely in a stadium.
Below, you can download a letter from our Head of R&D stating the RACE RESULT System meets the IAAF criteria.