definiens: shall mean any occurrence beyond the reasonable control.of a Party ' that prevents or substantially interferes with the perfoimance by the Party of anY of its obligations hereunder, if such occurs by reason of any act of God, flood, fire, explosion, earthquake, strike, lockout, labor dispute, casualty or aCcident ; or war, revolution, civil commotion, acts of public enemies, blockage or embargo ; or any injunction, law, order, proclamation, regulation, ordinance, demand or requirement of any govemmentor of any subdivision, authority or representative of any such government ; or breakdown of plant, inability to procure or use materials, labor, equipment, transportation, < ? r energy sufficient to ' meet manufacturing needs without the necessity of allocation ; or any other cause whatsoever, whether similar or dissimilar to those above enumerated, beyond the 4 reasonable control of such Party, if and only iftlle party affected shall have used reasonable efforts to avoid such occurrence and to remedy it promptly ifi ! shall have occurred .