(1) The Commissioner may, at any time, vary or review a condition imposed on a licence under this Part.(2) The variation of a condition under this section has effect when notice of that variation is given in writing to the holder of the licence.(3) For the purposes of this section, notice may be given to a person (a) by email or facsimile; or(b) by leaving it at, or sending it by post to, the person's residential or postal address or place or address of business or employment, whichever is last known to the server of the notice.