regulator
noun [ C ]
GOVERNMENT, LAW uk/ˈreɡjəleɪtər/ usa person or an organization that checks whether a business is working according to official rules or laws:
The financial regulator has some limited powers to fine directors or companies.
The companies will have to present annual reports to the independent regulator to show what progress they are making in delivering community benefits.
Cost savings are essential if we have to live with the 15-20% price cut proposed by the industry regulator.
banking/communications/energy regulator The move was announced by the state's chief banking regulator.
a media/securities/rail regulator