7:--

(1) Where the Secretary of State is satisfied that a certificate of naturalisation granted by him has been obtained by false representation or fraud, or by concealment of material circumstances, or that the person to whom the certificate is granted has shown himself by act or speech to be disaffected or disloyal to His Majesty, the Secretary of State shall by order revoke the certificate.

(2) Without prejudice to the foregoing provisions the Secretary of State shall by order revoke a certificate of naturalisation granted by him in any case in which he is satisfied that the person to whom the certificate was granted either . . .

(a) has during any war in which His Majesty is engaged unlawfully traded or communicated with the enemy or with the subject of an enemy state, or been engaged in or associated with any business which is to his knowledge carried on in such manner as to assist the enemy in such war; or

(b) has within five years of the date of the grant of the certificate been sentenced by any court in His Majesty's dominions to imprisonment for a term of not less than twelve months, or to a term of penal servitude, or to a fine of not less than one hundred pounds; or

(c) was not of good character at the date of the grant of the certificate; or

(d) has since the date of the grant of the certificate been for a period of not less than seven years ordinarily resident out of His Majesty's dominions otherwise than as a representative of a British subject, firm, or company carrying on business, or an institution established, in His Majesty's dominions, or in the service of the Crown, and has not maintained substantial connection with Her Majesty's dominions; or

(e) remains according to the law of a state at war with His Majesty a subject of that state;

And that (in any case) the continuance of the certificate is not conducive to the public good.