Page:The Civil code of Japan (IA cu31924069576704).pdf/160
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532.
If there are several persons who have done the act specified in the advertisement, but only the one who has done it best is to receive the reward, such advertisement is valid only if a time is fixed therein within which the invitation must be acted upon.
The decision which of the persons who have acted upon the invitation has done so the best is to be made by the person designated in the advertisement. If no person is designated, it is to be decided by the advertiser.
The persons who have acted upon the invitation have no right to contest such decision.
If it is decided that several persons have done the act equally well, the provisions of Art. 531, 2 apply correspondingly.
Subsection II.
The Effect of a Contract.
533.
A party to a bilateral contract may refuse performance of his obligation until the other party tenders performance of his obligation. But this does not apply, if the other party’s obligation is not yet due.
534.
If the subject of a bilateral contract is the creation