This Agreement may not be amended, modified or supplemented unless such modification is in writing and signed by the holders of more than fifty percent (50%) of the Equity Securities of the Company then owned by the Shareholders and their respective Affiliated Entities; provided , however , that, (a) for so long as JLL and its Affiliated Entities own any Registrable Securities, no amendment, modification, or supplement to this Agreement shall be effective without the approval of JLL; and (b) so long as DSM and its Affiliated Entities own any Registrable Securities, no amendment, modification, or supplement to this Agreement shall be effective without the approval of DSM.