4. Section 4 of the principal Act is amended —
by inserting, immediately after the word “collecting,” in subsection (1), the word “sorting,”;
by deleting the words “and postcards” wherever they appear in subsection (1); and
by deleting subsection (2) and substituting the following subsection:
“(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.”.