Oor willie is correct, this applies to crofts that have subsequently been split and each part is now under separate ownership.
It actually affects quite a few people, me for one! The case was originally taken on by a crofter, I think in Sutherland.
It enables each owner to apply to de croft their part of the croft without having to get agreement with the owners or owner of the other parts of the croft as was previously the case.