24 Fluoridated water（1） If water may be added to food, the water—
（a） must be of potable quality; and
（b） may include the addition of fluoride to generally accepted levels by municipal authorities, or by contractors to municipal authorities managing municipal water supplies.
（2） In this regulation, generally accepted levels means levels that are permitted under the Health Act 1956, the Local Government Act 1974, or in any other enactment regulating water quality or reticulation.