Template:ISDA Master Agreement 1987 12

12 Notices
12(a) Effectiveness. Any notice or communication in respect of this Agreement will be sufficiently given to a party if in writing and delivered in person, sent by certified or registered mail (airmail, if overseas) or the equivalent (with return receipt requested) or by overnight courier or given by telex (with answerback received) at the address or telex number specified in Part 4 of the Schedule. A notice or communication will be effective:-

12(a)(i) if delivered by hand or sent by overnight courier, on the day it is delivered (or if that day is not a day on which commercial banks are open for business in the city specified in the address for notice provided by the recipient (a “Local Banking Day”), or if delivered after the close of business on a Local Banking Day, on the first following day that is a Local Banking Day);
12(a)(ii) if sent by telex, on the day the recipient's answerback is received (or if that day is not a Local Banking Day, or if after the close of business on a Local Banking Day, on the first following day that is a Local Banking Day); or
12(a)(iii) if sent by certified or registered mail (airmail, if overseas) or the equivalent (return receipt requested), three Local Banking Days after despatch if the recipient's address for notice is in the same country as the place of despatch and otherwise seven Local Banking Days after despatch.

12(b) Change of Addresses. Either party may by notice to the other change the address or telex number at which notices or communications are to be given to it.