No. 33 15 Electronic Transactions (b) is capable of retention for subsequent reference; (c) is retained in the format in which it was generated, sent or received, or in a format which can be demonstrated to represent accurately the information generated, sent or received; and (d) is retained to enable the identification of the origin and destination of the electronic record and the date and time when it was sent or received. (2) A document, record or information referred to in subsection (1) shall be kept in electronic form for at least seven years. (3) The obligation to retain a document, record or information under this section shall not extend to information whose purpose is only to enable the message to be sent or received. (4) The provisions of this section may be satisfied by the use of services of another party as long as all the provisions of the section are complied with. 18.__(1) Where a security procedure has been applied to an electronic record at a specific point in time, the record shall be a secure electronic record from the time the security procedure has been applied. Secure electronic record (2) An unauthorized alteration of a security procedure shall render the record invalid. (3) An alteration shall be unauthorized if it is done by a person without the lawful authority of the person who originally applied a security procedure. 19. Validity of a contract shall not be affected by the sole reason that it is executed in electronic form, if the contract has fulfilled all other requirements for formation of such type of contract. 20.__(1) Unless otherwise agreed by the parties, the dispatch of an electronic message shall occur when such message leaves an information system under the control of the sender or an agent of the sender. (2) Unless otherwise agreed by the parties, receipt of an electronic message shall occur__ (a) where the recipient has designated an information system for the purpose of receiving the electronic message, when the electronic message has entered the designated information system; or Validity of a contract executed in electronic form Time and place of dispatch and receipt of an electronic message