a statement false in a material particular was made by him or on his behalf in relation to his application for certification,

he has been convicted of an offence in connection with VAT or has made a payment to compound such proceedings under section 152 of the Customs and Excise Management Act 1979 as applied by section 72(12) of the Act,

he has been assessed to a penalty under section 60 of the Act,

he ceases to be involved in designated activities,

he dies, becomes bankrupt or incapacitated,

he is liable to be registered under Schedule 1 or 3 to the Act,

he makes an application in writing for cancellation,

he makes an application in writing for registration under Schedule 1 or 3 to the Act, and such application shall be deemed to be an application for cancellation of his certificate,

they consider it is necessary to do so for the protection of the revenue, or

they are not satisfied that any of the grounds for cancellation of a certificate mentioned in sub-paragraphs (a) to (h) above do not apply.

the date when the Commissioners discover that such a statement has been made,

the date of his conviction or the date on which a sum is paid to compound proceedings,

30 days after the date when the assessment is notified,

the date of the cessation of designated activities,

the date on which he died, became bankrupt or incapacitated,

the effective date of registration,

not less than one year after the effective date of his certificate or such earlier date as the Commissioners may agree,

not less than one year after the effective date of his certificate or such earlier date as the Commissioners may agree,

the date on which the Commissioners consider a risk to the revenue arises, or

the date mentioned in sub-paragraphs (a) to (h) above as appropriate.