Acronyms and Initialisms.
Legal writers are addicted to defined terms, especially shorthand forms made of initials. (An acronym is sounded as a word [UNESCO], while an initialism is pronounced letter by letter [HMO].) Although abbreviations are highly convenient, it’s a false sense of convenience: they benefit the writer but burden the reader—unless they’re already extremely well known, and most aren’t.
This burdening of the reader skews the reader-writer relationship. The whole idea instead is to make the reader’s job easier, even if this means making the writer’s job more difficult.
A certain judicial opinion defines the following terms: EFP, FCM, HC, NYME, REDCO, ROI, and TOI. Before we know it, we read that an FCM represents REDCO before NYME, expecting an improved ROI, but that the FCM also has duties to TOI, under EFP-1, to certify that TOI owned enough HCs to cover its EFP obligations. To most readers, it’s all gibberish.
Instead, use real words. Make it succinct, but use real words. Otherwise, your readers will rebel by putting your prose down and never again returning to it—or if they do return to it, they’ll detest you.