All electronic identification devices, other than replacement devices and boluses, must be yellow and no keeper may apply a yellow identification device that is not electronic.

No person may attach a red identification device to any animal, other than a replacement identification device.

Where a keeper re-identifies an animal and that animal is not on its holding of birth, or the keeper does not know the holding of birth, they must use a red replacement identification device but the requirement to use a red identification device does not apply to the use of boluses.

Where an animal is identified by means of a bolus and a second identification device that second device must be black and a black identification device may only be used in combination with a bolus.

The characters on all identification devices must be a different colour from the background of the device and must be clearly legible at all times when the device is attached to an animal.

The fixing mechanism of a yellow, red or black eartag may be of any colour.