I have a house built in approx. 1972. There are no GFCI circuits in the baths or kitchen. The house is located in Massachusetts. My question is, if I put a GFCI circuit breaker in the service panel replacing the original breakers for the bath circuits and the kitchen circuits, will that satisfy the NEC code? Or do I have to put GFCI recepticles in these rooms? OR do I need Both?