It is the policy of the United States that it will pay claims or judgments for bodily injury, death, or damage to or loss of real or personal property proven to have resulted from a nuclear incident involving the nuclear reactor of a United States warship: Provided, That the injury, death, damage, or loss was not caused by the act of an armed force engaged in combat or as a result of civil insurrection. The President may authorize, under such terms and conditions as he may direct, the payment of such claims or judgments from any contingency funds available to the Government or may certify such claims or judgments to the Congress for appropriation of the necessary funds.