Any notices or other communications provided for hereunder may be made by hand, by ce rtified or registered mail, postage prepaid, return r eceipt requested, or by nationally recognized express courier services provided that the same are addressed to the party required to be notified at its address first written above, or such other address as may h ereafter be estab l ished by a party by written notice to the other party. Notice sha ll be considered accomp li shed on the date delivered, three days af t er being mailed or one day after deposit w i th the express courier, as app li cable.