What is another word for relation back?
Pronunciation: [ɹɪlˈe͡ɪʃən bˈak] (IPA) 
The phrase "relation back" typically refers to the ability to retroactively apply a legal action or decision to an earlier date. Synonyms for "relation back" may include phrases such as "retroactive application," "backdating," or "retrospective effect." Another possible synonym could be "antecedent validity," which refers to the ability of a legal decision to have an effect on events that occurred prior to the decision's issuance. Similarly, "retroactive validity" may be used to describe the same idea. Ultimately, the choice of synonym will depend on the context of the situation in question, as well as the intended audience's level of legal expertise.
