When a party performs their obligations required by the contract they are no longer subject to it.

Where one party commits a serious breach, the other party will be entitled to terminate the contract. However it is important to realise that not every breach is sufficiently serious to allow termination. If a party attempts to terminate a contract without a legal right to do so, their actions will be regarded as repudiation of the contract and the other party will gain a right to terminate and recover damages.

A contract is regarded as frustrated when one of the parties is unable to perform what they contracted to do due to an unforseen intervening event. Frustration is difficult to prove but if it can be established, both parties will be discharged from their contractual obligations.