Calling line identity not to be concealed
(1) A person who, on or after the prescribed date, makes a voice call containing a specified message or causes a voice call containing a specified message to be made or authorises the making of a voice call containing a specified message, addressed to a Singapore telephone number from a telephone number or facsimile number, shall not do any of the following:
(a) conceal or withhold from the recipient the calling line identity of the sender;
(b) perform any operation or issue any instruction in connection with the sending of the specified message for the purpose of, or that has the effect of, concealing or withholding from the recipient the calling line identity of the sender.
(2) Any person who contravenes subsection (1) shall be guilty of an offence and shall be liable on conviction to a fine not exceeding $10,000.