4(1)The Board shall have power to revoke the registration of any scheme on any of the grounds (a), (b), (c) or (d) specified in paragraph 3(1) above.
(2)The Board shall also have power to revoke the registration of any scheme where it appears to them that an unsuitable person has been employed for reward in connection with the promotion of any lottery under that scheme.
(3)The revocation of the registration of any scheme under this paragraph shall not have effect in relation to any lottery in respect of which any tickets or chances have already been sold at the date of revocation.