—(1) As from 1st December 1999 and subject to this Act, the Postal Authority shall have the exclusive privilege of conveying from one place to another letters and performing all incidental services of receiving, collecting, sorting, sending, despatching and delivering letters.
(2) Subject to the provisions of this Act, no person shall convey within Singapore any letter from one place to another (whether the place is within or outside Singapore), or perform such incidental services of receiving, collecting, sorting, sending, despatching and delivering letters, unless the person —
is the Postal Authority;
holds a postal licence authorising him to do so; or
is acting as an employee or agent of the Postal Authority, or of a person who is authorised under a postal licence to do so.