I adhere to defined by Furoya. A translation of the Latin phrase can also be considered as "as long as things remain the same". In law there is the complete Latin phrase "pacta sunt servanda rebus sic stantibus" whose meaning is "pacts must be fulfilled, as long as things remain so ( or equal to ). This means that as long as the initial conditions of a covenant or contract do not change, they will always have valid, everything must remain the same (intact), does not deserve additions, changes or others and remain mandatory by the parties involved.
Latin expression used in civil and international law, "Rebus sic stantibus" ( "where things are like this") is used explicitly or implicitly in a contract to be considered valid until the circumstances existing at the time of its conclusion are changed, and that one of the parties is unable to comply for reasons beyond its control. See "pacta sunt servanda" .