This code system http://hl7.org/fhir/contracttermsubtypecodes defines the following codes:

CodeDisplayDefinition
conditionConditionTerms that go to the very root of a contract.
warrantyWarrantyLess imperative than a condition, so the contract will survive a breach
innominateInnominateBreach of which may or may not go to the root of the contract depending upon the nature of the breach