Forbiddance – this term finds usage in the area of Administrative Law. There it refers to a legal restriction against the use of something or against certain conduct. It could participate also in an official order by the authorities – verbal or written. In practice, a prohibition could be temporary or permanent. And usually, there can not be any questioning or appeal against it. The goal is to save the public order. Or to save the human body from eventual injuries or death. For example, there could be a governmental prohibition for passing through certain state roads, due to bad weather condition.
Synonyms are an injunction, prohibition, and prevention.