No horse may start in a race without a legible lip tattoo number being or readable microchip applied by the designated personnel appropriate to the breed of horse. The stewards, in their discretion, may approve a readable microchip approved by The Jockey Club for identification purposes if appropriate. In harness racing, no Standardbred may start in a race without either a legible lip tattoo, or a freeze brand number being, or readable microchip applied by the designated personnel appropriate to the breed of horse.