Which term describes a situation that is specific to a particular case at hand?

The term "Ad Hoc" refers to a situation or action that is specifically tailored for a particular case or issue, rather than being applicable in a general or universal manner. This term is often used in legal contexts to indicate that a decision, solution, or committee is formed to address a unique circumstance without the intent for broader application.

In contrast, while "Case Specific" appears similar, it is not a recognized legal term in the same way "Ad Hoc" is. "Totality" relates to considering the entirety of a situation, rather than focusing on specific instances, and "Pro Rata" is a term that refers to proportional allocation, usually in financial contexts. Therefore, "Ad Hoc" accurately captures the essence of being particular and situation-specific in its application.