definiens: , as hereinafter defined, shall not constitute a default hereunder or subject the party affected by Force M ajeure to any liability to the other ; provided, however, the part y so affected shall promptly notify the other of th e existence thereof and of its expected duration and the estima ted effect thereon upon its ability to perform its obligations hereunder . Such party shall promptly notify the oth er party when such Force Majeure circumstance has c eased to affect its ability to perform its obligations hereu nder . The quantity to be delivered hereunder shall be reduced to the extent of the deliveries omitted for such cause or causes unless both parties agree that the total quantity to be delivered shall remain unchanged ; and Buyer shall b e free to purchase elsewhere any quantities Seller is unable to deliver due to such Force Majeure circumstance . For so long as its ability to perform hereunder is affected by such Force Majeure circumstances, Seller may, at it s option, elect to allocate its total production of such Products among its various requirements therefore ( e.g., manufacturing and sales ) in such manner as Se ller deems practicable and which, in the opinion of Sell er, is fair and reasonable [ * * * * * ] for Buyer ’s faci lities covered by the Agreement . During the time that Sell er is unable to make deliveries or otherwise perfor m, it shall not be obligated to procure, or to use its best eff orts to procure, any quantity of Products sold here under from any alternate producer or supplier . As used herein, the term shall mean and include any ac t of God, war, riot, fire, explosion, accident, flood, sabota ge, governmental laws, regulations, order, injuncti on, or other acts of government ( including any agency or departm ent of the United States of America ), strikes, plan t or equipment failure, lack of availability of material s, energy, labor, or equipment, and other circumsta nces beyond the reasonable control of the affected party . In th e event a Force Majeure circumstance affects either party ’s performance hereunder for at least 60 consecutive d ays, the party who is able to perform may terminate this Agreement upon written notice to the affected party