All notices (including requests, demands, approvals, or other communications) under this Lease shall be in writing. Notice shall be sufficiently given for all purposes as follows: (a) When personally delivered to the recipient, notice is effective on delivery; (b) When mailed first class to the last address of the recipient known to the party giving notice, notice is effective on delivery; (c) When mailed by certified mail with return receipt requested, notice is effective on receipt if delivery is confirmed by a return receipt; (d) When delivered by overnight delivery, such as Federal Express or other recognized overnight delivery service, with charges prepaid or charged to the sender’s account, notice is effective on delivery if delivery is confirmed by the delivery service; and (e) When sent by telex or fax to the last telex or fax number of the recipient known to the party giving notice, notice is effective on receipt as long as (I) a duplicate copy of the notice is promptly given by first-class or certified mail or by overnight delivery or (2) the receiving party delivers a written confirmation of receipt. Any notice given by telex or fax shall be considered to have been received on the next business day if it is received alter 5 p.m. (recipient’s time) or on a nonbusiness day.