English: Agent of Change Principle
Welsh: Egwyddor Cyfrwng Newid
Subject: Cynllunio
Welsh definition: The Agent of Change Principle means that the person or business responsible for the change is responsible for managing the impact of the change. This means that an apartment block to be built near an established live music venue would have to pay for soundproofing, while a live music venue opening in a residential area would be responsible for the costs.
Notes: Cyfyd y term hwn gan amlaf yng nghyd-destun cynllunio a mannau lle chwaraeir cerddoriaeth, er ei fod yn berthnasol i feysydd eraill hefyd.