Receptacle outlets are not required by area designation. However, receptacle outlets are required where flexible cords with attachment plugs are used - 210.50(B). For example, if the dining room is carpeted, a vacuum sweeper will be used and thus requiring receptacle outlet(s) be installed. Number and location will be a subjective determination based on the typical length of a vacuum cleaner cord.Are the NEC requirements of a dinning room in a restaurant the same as that of a residence regarding wall outlets? In other words, are outlets required? If so, do they need to be tamper proof? Do they need to be rated for 20 amps?