What is another word for grand-fathering?
Pronunciation: [ɡɹˈandfˈɑːðəɹɪŋ] (IPA) 
Grandfathering, or the practice of exempting an individual or company from new rules or regulations due to previous status or agreements, has several synonyms such as "exempting," "exclusion," "carve-out," and "legacy." Another term commonly used in the context of grand-fathering is "preeisting." Preexisting conditions, for example, are exempted from some health insurance rules. In the construction industry, it is often referred to as "vested rights" or "nonconforming use." Similarly, in some legal contexts, it may be referred to as "acquired rights" or "continuing guarantees." Overall, grand-fathering provides an exception to enforce new regulations, enabling a smoother transition while preserving the status quo of previous agreements and rules.
