This sub-article shall cease to be effective as from: 1- The time when the addressee has received notice from the originator that the electronic message is not that of the originator and the addressee had been given reasonable time to act accordingly. 2- The time when the addressee came to know or ought to have known had he exercised reasonable care or used an agreed procedure that the electronic message is not that of the originator. This sub-article is also ineffective if it is not acceptable for the addressee to consider that the electronic message is that of the originator or to act in accordance with this assumption and the addressee is entitled to consider each electronic message received by him as an independent correspondence and to act on that assumption only unless he knows or ought to have known if he exercises reasonable care or uses an agreed procedure that the electronic message was a mere duplicate. Article (16) Where the originator has requested the addressee or agreed with him on or before sending the electronic message or through that message, that the acknowledgement of receiving that message shall be admitted, then the provisions of Article (15) of this law shall be applied subject to the followings: 1) Where the originator has stated that the electronic message is conditional on receipt of the acknowledgement, the electronic message is to be treated, with regard to the rights and obligations as between the originator and the addressee, as though it has never been sent until the acknowledgement is received by the originator. 2) Where the originator has requested an acknowledgement of receipt of the electronic message but he has not stated that the electronic message is conditional on receipt of the acknowledgement within the time specified or agreed upon, or that such time is not agreed or specified, then the originator shall give to the addressee notice stating that no acknowledgement has been received and specifying a reasonable time within which the acknowledgement shall be received. If the acknowledgement is not received within the time specified or agreed upon, the originator may, upon notice to the addressee, treat the message as though it had never been sent. 3) Where the originator received the addressee’s acknowledgement of receipt, it is presumed that the related electronic message was received by the addressee unless the contrary is proved. That presumption does not imply that the contents of the electronic message sent by the originator corresponds to the message received by the addressee. 4) Where the originator has not agreed with addressee that the acknowledgement be given in a particular form or by a particular method, then an acknowledgement may be communicated by mean of any correspondence from the side of the addressee electronically or otherwise or any conduct of the addressee capable of confirming to the originator that the electronic message has been received. 5) Where the acknowledgement received by the originator states that the related electronic message met the technical requirements whether those agreed upon or stated in the applicable standards, it is presumed that those requirements were met until the contrary is proved. Article (17) Unless otherwise agreed between the originator and the addressee: (1) The dispatch of the electronic message occurs when it enters an information system outside the control of the originator or of the person who sent the electronic message on behalf of him. 7