10. Receipt of written communications

Unless otherwise agreed by the parties to a dispute:

(a) any written communication, notification, or proposal is deemed to have been received if it is delivered to the addressee personally or if it is delivered at his place of business, habitual residence, mailing or electronic address; if none of these can be found after making a reasonable inquiry, a written communication is deemed to have been received if it is sent to the addressee's last known place of business, habitual residence, mailing or electronic address by any means which provides a record of the attempt to deliver it;
(b) the communication is deemed to have been received on the day it is so delivered; and
(c) time periods specified in these Regulations, or to be agreed by the parties or determined by the arbitral tribunal in accordance with these Regulations, shall start to run on the day following the day when a notice or communication is received. If the last day of any such period is an official holiday or a non-business day at the place where the notice or communication is received, the period shall be extended until the first business day which follows. Official holidays and non-business days occurring during the running of the period of time shall otherwise be included for the purposes of calculating the period.