9.—(1) The Chief Constable shall revoke a firearm certificate if he is satisfied that the holder cannot be permitted to have in his possession or to purchase or acquire any firearm or ammunition to which the certificate relates without danger to public safety or to the peace.
(2) The Chief Constable may revoke a firearm certificate if he has reason to believe that the holder—
(a)is not a fit person to be entrusted with a firearm; or
(b)does not have a good reason for having in his possession, or for purchasing or acquiring, any firearm or ammunition to which the certificate relates.
(3) The Chief Constable shall revoke a firearm certificate if he is satisfied that the holder is prohibited by this Order from possessing a firearm.
(4) The Chief Constable may revoke a firearm certificate if the holder fails to produce it in accordance with a notice under Article 6(2) (firearm certificate to be produced to Chief Constable within 21 days).
(5) The Chief Constable may, subject to paragraph (6), partially revoke a firearm certificate, that is to say, he may revoke the certificate in relation to any firearm or ammunition which the holder is authorised by virtue of the certificate to have in his possession or to purchase or acquire.
(6) The Chief Constable may partially revoke a firearm certificate under paragraph (5) only if he has reason to believe that the holder does not have a good reason for having in his possession, or for purchasing or acquiring, the firearm or ammunition to which the partial revocation relates.