Breeders who are members of the Wiltipoll Association are bound by the rules of the Association and the Wiltipoll classification system. More information is available in the Flock Register (attachment) but broadly a Wiltipoll must shed it's fleece annually.
If you intend to register your purchase, check the latest (attached) Flock Register to ensure that rams are currently registered and ewes are from a registered flock. If this is not the case it is very unlikely that the sheep will be entitled to future registration. Refer to Members page for breeders of both registered and unregistered sheep.