12. The Scottish Ministers must not cause to be killed any sheep or goat, or cause to be destroyed any ovum or embryo, under this Schedule until—
(a)they have received written notification from the person on whom the notice is served that that person has no intention to proceed with an appeal;
(b)after the 21 day period for appeal under regulation 10 has expired; or
(c)if there is an appeal, the appeal is refused or withdrawn.