The Commissioners shall not, under paragraph 6(1) above, cancel a person’s registration with effect from any time unless they are satisfied that it is not a time when that person would be subject to a requirement to be registered under this Act.

The Commissioners shall not, under paragraph 6(3) above, cancel a person’s registration with effect from any time unless they are satisfied that it is not a time when that person would be subject to a requirement, or entitled, to be registered under this Act.

The registration of a person who has exercised such an option as is mentioned in paragraph 1(2) above shall not be cancelled with effect from any time before the 1st January which is, or next follows, the second anniversary of the date on which his registration took effect.

In determining for the purposes of this paragraph whether a person would be subject to a requirement, or entitled, to be registered at any time, so much of any provision of this Act as prevents a person from becoming liable or entitled to be registered when he is already registered or when he is so liable under any other provision shall be disregarded.