фундаментальное нарушение договора(нарушение, которое может пошатнуть сами основы договора: After examining the dictionary meaning and the common law meaning of "material", Warren J concluded that a "material breach" can be equated with the expression known to the law of contract of "fundamental breach", being a breach that goes to the very root of the contract. sankozh)
существенный для чего-либо(Note that terms of the contract which are specifically material to the claim are set out in paragraphs 3 and 4. LE oshkindt)
