The Administrator shall, after consultation with appropriate Federal agencies and within nine months of October 27, 1972, develop and publish criteria with respect to noise. Such criteria shall reflect the scientific knowledge most useful in indicating the kind and extent of all identifiable effects on the public health or welfare which may be expected from differing quantities and qualities of noise.

The Administrator shall, after consultation with appropriate Federal agencies and within twelve months of October 27, 1972, publish information on the levels of environmental noise the attainment and maintenance of which in defined areas under various conditions are requisite to protect the public health and welfare with an adequate margin of safety.