The Town and Country Planning Act 1990 defines taking formal "enforcement action" as the issue of an Enforcement Notice or the service of a Breach of Condition Notice.
Mae Deddf Cynllunio Gwlad a Thref 1990 yn diffinio cymryd "camau gorfodi" ffurfiol fel mater Hysbysiad Gorfodi neu gyflwyno Hysbysiad Torri Amodau.