The centre has proposed changing rules that will enable closer supervision of the Reserve Bank of India, people with knowledge of the matter said, a move that may undermine investor confidence in the world's fastest-growing major economy. Prime Minister Narendra Modi's administration has recommended that the RBI board draft regulations to enable setting up panels to oversee functions including financial stability, monetary-policy transmission and foreign-exchange management, the people said, asking not to be identified as the discussions are private.