de.wikipedia.org/wiki/R%C3%B6misches_Recht

In Roman law, edicta were unilateral imperial enactments. Standard reference works define an edict as an order or proclamation issued under authority and having the force of law, and classify edicta among the emperor’s general and abstract normative acts. Describing them as "Vereinbarungen" (agreements) is therefore incorrect, because an agreement implies a bilateral or multilateral arrangement, while an edictum is an authoritative decree issued by the ruler.

Treccani’s entry on costituzioni imperiali explains that edicta belonged to the category of acts by which the prince gave general rules; the 1911 Encyclopædia Britannica defines an edict as an order or proclamation with legal force. Both contradict the article’s gloss "allgemeine Vereinbarungen".