In federal or multi-jurisdictional regulation systems there may exist conflicts between the various lower appellate courts. Sometimes these differences will not be resolved, and it could be necessary to distinguish how the regulation is applied in one district, province, division or appellate department. These past decisions are called "case law", https://felixasfrd.blogsmine.com/37790051/considerations-to-know-about-case-laws-on-biodiversity-in-india