Pay its indebtedness and other obligations promptly and in accordance with their terms and pay and discharge promptly when due all material Taxes, assessments and governmental charges or levies imposed upon it or upon its income or profits or in respect of its property, before the same shall become delinquent or in default, as well as all lawful claims for labor, materials and supplies or otherwise that, if unpaid, might give rise to a Lien upon such properties or any part thereof, except, in each case, where the failure to pay or perform such items would not reasonably be expected to have a Material Adverse Effect; provided , however , that such payment and discharge shall not be required with respect to any such Tax, assessment, charge, levy or claim so long as the validity or amount thereof shall be contested in good faith by appropriate proceedings and the Borrowers shall have set aside on their books adequate reserves with respect thereto in accordance with GAAP and such contest operates to suspend enforcement of a Lien and, in the case of a Mortgaged Vessel, there is no risk of forfeiture of such property.