Русско-англо-русский юридический словарь

Judicial precedent is a legal case law establishing a principle or rule that a court or other judicial body may apply while deciding subsequent cases involving similar issues or facts. (uslegal.com)

Judicial precedent: A judgment of a court of law cited as an authority for deciding a similar set of facts; a case which serves as authority for the legal principle embodied in its decision. The common law has developed by broadening down from precedent to precedent. (northumbria.ac.uk)

Among the typcal conditions that must be met before an employee can exercise the option that has been granted to him, it is frequently required that the employee continues to work for the employer during a certain period of time. To the extent that such a condition must be met before the option becomes exercisable, that condition has, in many countries, the legal nature of a condition precedent (common law) or suspensive condition (civil law). The option is not considered to have vestee before such a condition has been met. (Model Tax Convention on Income and on Capital 2010 By OECD)

A condition precedent is one which must be performed before the estate will vest, or before the obligation is to be performed. (lectlaw.com)