Condition precedent

A condition precedent is an event or state of affairs that is required before something else will occur. In contract law, a condition precedent is an event which must occur, unless its non-occurrence is excused, before performance under a contract becomes due, i.e., before any contractual duty exists.^[1]

In estate and trust law, it is a provision in a will or trust that prevents the vesting of a gift or bequest until something occurs or fails to occur, e.g. the attainment of a certain age or the predecease of another person. For comparison, a condition subsequent brings a duty to an end whereas a condition precedent initiates a duty.

In computing, a while loop is an instruction to check a condition precedent, then execute an action only if that check evaluates to 'true'; after which execution, control then returns to the beginning of the loop and the cycle of check and conditional execution begins again. By contrast, a do while loop first executes the action, next checks a condition subsequent, then returns control to the beginning of the loop if the check evaluated to 'false.'

Cases[edit]

• Poussard v Spiers and Pond (1876) 1 QBD 410

See also[edit]

• Condition subsequent
• Necessary condition
• Sufficient condition

Notes[edit]

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