6E+W+SThe Board may at any time revoke any such certificate if it appears to the Board that, in relation to the premises specified in the certificate, the person to whom the certificate relates is not a fit and proper person to perform the function or act in the capacity so specified.
7E+W+SWhere the Board determine to revoke any such certificate, they shall serve a notice on the person to whom it relates stating that the certificate is revoked as from the end of the period of twenty-one days from the date of service of the notice; and the revocation shall take effect at the end of that period.