16.4.Any notice served by a party to this Agreement may be sent by air mail, registered mail, or by facsimile transmission to the address of the other set out above and if so sent will be deemed to have been served in respect of air mail, registered mail ten working days after the date of posting and in respect of facsimile transmission at the time of such transmission.
16.5.The failure of any party to enforce any provision on any one occasion will not affect its right to enforce another provision or the same provision on another occasion.