This Guaranty shall remain in full force and effect with respect to each Guarantor until the earlier of (a) with respect to SXL, the execution and delivery to the Administrative Agent of one or more assignments, assumptions, agreements or other documentation (each in form and substance reasonably acceptable to the Administrative Agent) pursuant to which, when taken as a whole, the Borrower will acquire substantially all of the assets and assume substantially all of the liabilities of SXL and (b) with respect to each Guarantor, indefeasible payment in full of the Guarantied Obligations and the termination or cancellation of all Guarantied Documents in accordance with their respective terms.