The provisions of this Warrant and all of the other Warrants may be amended and the Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company has obtained the written consent of the Persons holding Warrants representing not less than two-thirds of the Common Stock obtainable upon exercise of all such Warrants then outstanding; provided, that the number of Warrant Shares subject to this Warrant, the Exercise Price, the Initial Exercise Date and the Termination Date may not be amended, and the right to exercise this Warrant may not be altered or waived, without the written consent of the Holder. Any such amendment shall apply to all Warrants and be binding upon all registered holders of such Warrants whether or not they have consented (except only for those amendments that, pursuant the preceding sentence, require the written consent of the Holder).