18 Electronic Transactions No. 33 (3) Where a sender of an electronic message states that an electronic message shall be valid on receipt of acknowledgement by the recipient, the electronic message shall not be considered as sent until the acknowledgement is received. (4) Where a sender of an electronic message receives a recipient's acknowledgement of receipt of the message, it shall be presumed that the message has reached the recipient, but this presumption shall not mean that the electronic message corresponds to the message received. (5) Where a party has not indicated that the communication of the electronic message is conditional on receipt of an electronic message, and acknowledgement has not been received by the recipient within the time specified or agreed, or if no time has been specified or agreed, within a reasonable time__ (a) the sender of the electronic message may notify the recipient that no acknowledgement has been received and specify a reasonable time by which the acknowledgement shall be received; and (b) if the acknowledgement of receipt is not received within the specified period stipulated in paragraph (a), the sender of the electronic message may, upon notice to the recipient, treat the electronic message as though it has never been sent, or exercise any other right that the sender may have. (6) Where an acknowledgement of receipt indicates that an electronic message complies with the technical conditions, prescribed either by an agreement or by applicable law, these conditions shall be deemed to be fulfilled. Freedom of communication and its limitations (7) Except insofar as it relates to the sending or receipt of an electronic message, this section shall not affect the legal consequences that may flow either from that message or from the acknowledgement of its receipt. PART IV__LIABILITY OF ONLINE INTERMEDIARIES AND CONTENT EDITORS AND PROTECTION OF ONLINE USERS 24.__(1) Subject to this Act, there shall be no limitations to online public communication. (2) Notwithstanding the provisions of subsection (1), online public communication may be restricted in order to__ (a) prohibit child pornography; (b) prohibit incitement on racial hatred, xenophobia or violence;