Русско-англо-русский юридический словарь

In many countries, however, a condition subsequent (common law) or a resolutory condition (civil law) would not prevent the option from vesting. That would be the case, for example, of a condition that is applicable after the option becomes exercisable and under which the option will be lost if employment is terminated before the option is exercised. When all conditions (such as that one) under which the option may be forfeited have disappeared, the option, which has already vested in the previous example, is said to have "irrevocable" vested. (Model Tax Convention on Income and on Capital 2010 By OECD)

RESOLUTORY CONDITION: a condition that under civil and Scots law upon fulfillment terminates a contract and entitles the parties to be restored to the status quo (merriam-webster.com/dictionary/)

Art. 1556. A donation inter vivos may be revoked because of ingratitude of the donee or dissolved for the nonfulfillment of a suspensive condition or the occurrence of a resolutory condition. (Louisiana Civil Code)