What is another word for grandfather clause?
Pronunciation: [ɡɹˈandfɑːðə klˈɔːz] (IPA) 
A "grandfather clause" is a term used in legal terminology which denotes a provision in a law that exempts a particular group of people from abiding by a newly introduced rule, on account of their pre-existing situation. Some common synonyms for the phrase include "prior-enactment clause", "existing rights clause", or "continuity clause". The use of such clauses is often intended to safeguard the interests of a group who would otherwise be negatively impacted by a new law, and thus helps ensure the smooth implementation of legal changes without causing undue hardship or confusion. Other related terms include "vesting clause", "savings clause", or "non-retroactivity clause".
