Page:The Civil code of Japan (IA cu31924069576704).pdf/55
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129.
The rights and duties which the parties have, while the condition is pending, may be dealt with, inherited, protected or secured according to the general provisions of the law.
130.
If the party whose interests would be adversely affected by the happening of the condition intentionally prevents it from happening, the other party may treat it as if it had happened.
131.
When the condition has already happened at the time of the juristic act, the latter is unconditionally valid, if the condition is precedent, and is void, if the condition is subsequent.
When it is certain at the time of doing the juristic act that the condition will not happen, the act is void, if the condition is precedent, and unconditionally valid, if the condition is subsequent.
In the cases mentioned in the foregoing two paragraphs the provisions of Arts. 128 and 129 apply, so long as the parties do not know whether the condition has happened or will not happen.
132.
A juristic act upon an unlawful condition, or conditioned upon the not doing of an unlawful act, is void.
133.
An act upon a condition precedent which is impossible is void.
An act upon a condition subsequent which is impossible is unconditionally valid.