If a condition precedent requires the performance of an act wrong of itself, the instrument containing it is so far void, and the right cannot exist. If it requires the performance of an act not wrong of itself, but otherwise unlawful, the instrument takes effect and the condition is void.
(Enacted 1872.)
Section Seven Hundred and Ten. Conditions imposing restraints upon marriage, except upon the marriage of a minor, are void; but this does not affect limitations where the intent was not to forbid marriage, but only to give the use until marriage.