definiens: means any occurrence beyond the reasonable control of a Party that prevents or substantially interfereswith the performance 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, actsof terrorism, acts of public enemies, blockage or embargo ; or any injunction, Law, order, proclamation, regulation, ordinance, demand or requirement of any Governmental Authority ; or breakdown of plant, inability to procure or usematerials, labor, equipment, transportation, or energy sufficient to meet manufacturing needs without the necessity ofallocation ; or any other cause whatsoever, whether similar or dissimilar to those above enumerated, beyond thereasonable control of such Party, if and only if the Party affected shall have used reasonable efforts to avoid suchoccurrence and to remedy it promptly if it shall have occurred