A refugee camp holding thousands of displaced Darfurians/Sudanese in the aftermath of war in the western part of Sudan. A long history of civil war, local tensions, government distrust, and new environmental pressures have scarred the country and brought about the world's worst humanitarian crisis..
In order for a contract to be enforceable, each party to the contract must change his or her legal position in some way. If an agreement lacks consideration, it is generally not a binding and enforceable contract. There are a few exceptions to this rule. A person sued for breaking a promise generally will not be held liable when no consideration was received for the promise.
As a general rule, if a contract lacks a term that is necessary for the contract, a reasonable term will be implied. For many contracts, if there is no term of time then there likely isn't any 'contract' at all.