times keep the other informed of its principal place of business if different from that stated herein, and shall promptly notify the other of any change, giving the address of the new place of business or residence. I. NOTICES. All notices that are required to be or may be sent pursuant to the provision of this Agreement shall be sent by certified mail, return receipt requested, or by overnight package delivery service to each of the parties at the addresses appearing herein, and shall count from the date of mailing or the validated air bill. J. MODIFICATION AND WAVIER. A modification or waiver of any of the provisions of this Agreement shall be effective only if made in writing and executed with the same formality as this Agreement. The failure of any party to insist upon strict performance of any of the provisions of this Agreement shall not be construed as a waiver of any subsequent default of the same or similar nature or of any other nature. K. INJUNCTIVE RELIEF. Solely by virtue of their respective execution of this Agreement and in consideration for the mutual covenants of each other, AVDU and UTK hereby agree, consent and acknowledge that, in the event of a breach of any material term of this Agreement, the non-breaching party will be without adequate remedy-at-law and shall therefore, be entitled to immediately redress any material breach of this Agreement by temporary or permanent injunctive or mandatory relief obtained in an action or proceeding instituted in any court of competent jurisdiction without the necessity of proving damages and without prejudice to any other remedies which the non-breaching party may have at law or in equity. - 5 - L. ATTORNEY'S FEES. If any arbitration, litigation, action, suit, or other proceeding is instituted to remedy, prevent