No amendment or waiver of any provision of this Guaranty and no consent to any departure by the Guarantor therefrom shall in any event be effective unless the same shall be in writing and signed by the Administrative Agent and the Required Lenders, and then such waiver or consent shall be effective only in the specific instance and for the specific purpose for which given; provided , however , that no amendment, waiver or consent shall, unless in writing and signed by all of the Secured Parties (other than any Lender Party that is, at such time, a Defaulting Lender), (a) reduce or limit the obligations of the Guarantor hereunder, release the Guarantor hereunder or otherwise limit the Guarantor’s liability with respect to the Obligations owing to the Secured Parties under or in respect of the Loan Documents, (b) postpone any date fixed for payment hereunder or (c) change the number of Secured Parties or the percentage of (x) the Commitments, (y) the aggregate unpaid principal amount of the Loans or (z) the L/C Obligations that, in each case, shall be required for the Secured Parties or any of them to take any action hereunder.