| fine print(noun, expression, condition, essential, requirement) |
| necessary(noun, need, essential, obligation, requirement) |
| obligation(noun, condition, need, essential, requirement) |
| rule(noun, law, condition, essential, foundation) |
| small print(noun, expression, condition, essential, requirement) |
| arrangement(noun, condition, essential, requirement, qualification) |
| basic(noun, law, condition, heart, essential) |
| clause(condition, requirement, proviso) |
| contingency(noun, condition, essential, requirement, qualification) |
| crux(noun, heart, essential, essence, basic) |
| essence(noun, condition, need, essential, certainty) |
| essential condition |
| exception(noun, condition, essential, requirement, qualification) |
| exemption(noun, condition, essential, requirement, qualification) |
| heart(law, condition, essential, foundation, basic) |
| indispensable |
| keystone |
| kicker(noun, condition) |
| main point(noun, expression, essence, core, outcome) |
| main thing(noun, expression, essence, core, outcome) |