5. If it appears to a keeper of sheep or goats that a sheep or a goat is missing an eartag, but the sheep or goat is otherwise marked in accordance with the 2000 Regulations, the keeper shall, if the keeper knows the flockmark and herdmark which was entered on the eartag which is missing, attach a movement tag on which those details are entered, but if the keeper does not know what details had been entered on the tag, the keeper may not replace the eartag.