Conditional (adjective)

1. Dependent on a particular condition or set of conditions.
2. Based on a particular set of assumptions.

Origin:

Late middle english: from latin conditionalis, from condition- "laying down conditions", from the verb condicionare (see condition).

Examples:

1. The offer is conditional upon receipt of a satisfactory reference.
2. The agreement is conditional on the completion of the project.
3. The acceptance is conditional upon passing the test.
4. The loan is conditional upon meeting certain criteria.
5. The promise is conditional upon fulfilling certain obligations.