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)

A contract or a contractual obligation can be made to terminate upon the occurrence of a future uncertain event. A provision to this effect is known as a resolutive condition, or condition subsequent. (unidroit.org)

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/)

Conditions subsequent refers to conditions which occur after the formation of a contract. This phrase refers to an occurrence which terminates the duty of a party to perform or do his/her part. Although there is a binding contract, one party has an escape clause provided that the contract terminates should certain conditions arise, ie if a company goes bankrupt. In a deed to real property, a condition subsequent refers to an event which terminates a person’s interest in the property (ie if a person gets divorced, they no longer have certain rights or interests in real property). (translegal.com)

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)