All notices required or permitted hereunder shall be in writing and shall be served on the parties at the addresses set forth in Section 1.1.1 . Any such notices shall be either (i) sent by overnight delivery using a nationally recognized overnight courier, in which case notice shall be deemed delivered upon receipt or rejection of delivery, (ii) sent by United States Mail, certified with return receipt requested, in which case notice shall be deemed delivered upon receipt or rejection of delivery, or (iii) sent by email or facsimile, in which case, within one (1) business day thereof, duplicate notice shall be sent in the manner provided in provision (i) or provision (ii) of this Section 10.10 , and such notice shall be deemed delivered upon confirmation of receipt of the email or facsimile during regular business hours (i.e., between (9:00 a.m. and 5:00 p.m. Pacific Time) on a regular business day (i.e., Monday through Friday, inclusive, but excluding holidays) or at 9:00 a.m. Pacific Time on the next regular business day after confirmation of receipt of the email or facsimile (a) after regular business hours on a regular business day or (b) on a day other than a regular business day. A party’s address may be changed by written notice to the other party; provided, however, that no notice of a change of address shall be effective until actual receipt (or refusal of acceptance of delivery) of such notice. Copies of notices are for informational purposes only, and a failure to give or receive copies of any notice shall not be deemed a failure to give notice. Notices given by Purchaser’s counsel shall be deemed given by Purchaser and notices given by Seller’s counsel shall be deemed given by Seller.