The Board may amend or terminate the Plan at any time; provided, however, that the Board shall not amend the Plan without approval of the stockholders of the Company if such approval is required in order to comply with the Code, applicable laws and stock exchange requirements, or as required by Section 21(b) below. No amendment or termination of this Plan shall, without the consent of the Participant, impair any rights or obligations under any Grant previously made to the Participant, unless such right has been reserved in the Plan or the Grant Instrument, or except as provided in Section 21(b) below.