If a term or designation is used in a case brief more than three times, then abbreviations should be used. At the first mention, they are written in full with the indication in brackets for the short version, and then only the abbreviated form is used in the text.
Excessive brevity reduces the quality of the material and complicates its perception. Therefore, you should buy a case brief https://writer-elite.com/buy-a-case-brief/ with ready abbreviations.