The giving of orders by someone who has complete authority
From Merriam-Webster:
1: a command or act of will that creates something without (or as if without) further effort
2: an authoritative determination
3: an authoritative or arbitrary order
Latin, let it be done, 3rd singular present subjunctive of fieri to become, be done
From Vocabulary.com:
A legally binding command or decision entered on the court record (as if issued by a court or judge)