grandfather clause → ρήτρα απεριόριστης διάρκειας, ρήτρα κεκτημένων δικαιωμάτων, πατρογονική ρήτρα
https://www.linguee.com/english-greek/search?source=auto&query=grandfather%20clauseThe
grandfather principle is related to the control and order within hierarchical organisations.
Examples of the principle's use in decision making:
A major decision has to be approved by the manager's manager (the "grandparent").
To guarantee fair and objective remuneration, all decisions concerning personal compensation and benefits made by a manager are also approved by the manager's manager.
https://wikivisually.com/wiki/Grandfather_principleA
grandfather clause (or grandfather policy or grandfathering) is a provision in which an old rule continues to apply to some existing situations while a new rule will apply to all future cases. Those exempt from the new rule are said to have grandfather rights or acquired rights, or to have been grandfathered in. Frequently, the exemption is limited; it may extend for a set time, or it may be lost under certain circumstances. For example, a "grandfathered power plant" might be exempt from new, more restrictive pollution laws, but the exception may be revoked and the new rules would apply if the plant were expanded. Often, such a provision is used as a compromise or out of practicality, to allow new rules to be enacted without upsetting a well-established logistical or political situation. This extends the idea of a rule not being retroactively applied.
There is also a rather different,
older type of grandfather clause, perhaps more properly a
grandfather principle in which a
government blots out transactions of the recent past, usually those of a predecessor government.
https://en.wikipedia.org/wiki/Grandfather_clause
