как обоснование невыполнения(If a party asserts Force Majeure as an excuse for failure to perform the party's obligation, then the nonperforming party must prove that the party took reasonable ... WK Alexander Demidov)
невыполнение или несоблюдение(NATS shall not be liable for any delay or failure to perform or comply with any obligation or warranty under the contract to the extent that the delay or failure is ... Alexander Demidov)