The Board may amend, alter, suspend, discontinue, or terminate the Plan or any portion thereof at any time; provided , that no such amendment, alteration, suspension, discontinuance or termination shall be made without stockholder approval if (i) such approval is necessary to comply with any regulatory requirement applicable to the Plan (including, without limitation, as necessary to comply with any rules or regulations of any securities exchange or inter-dealer quotation system on which the securities of the Company may be listed or quoted) or for changes in GAAP to new accounting standards; (ii) it would materially increase the number of securities which may be issued under the Plan (except for increases pursuant to Section 5 or 12 of the Plan); or (iii) it would materially modify the requirements for participation in the Plan; provided, further , that any such amendment, alteration, suspension, discontinuance or termination that would materially and adversely affect the rights of any Participant or any holder or beneficiary of any Award theretofore granted shall not to that extent be effective without the consent of the affected Participant, holder or beneficiary.  Notwithstanding the foregoing, no amendment shall be made to Section 13(c) of the Plan without stockholder approval.