Section 30(1) of the Firearms Act 1968 should be amended so as to provide for - o the revocation of a firearm certificate on the ground that the chief officer of police is satisfied that the holder does not have a good reason for having in his possession, or for purchasing or acquiring, the firearm or ammunition in respect of which the certificate is held; and for partial revocation; and o in the case of the revocation of a firearm certificate in respect of the ammunition to which it relates, the power to substitute different quantities (paras 8.31-8.33).