无规定

• It should be noted that there is no requirement for industry in general to achieve the acceptable noise levels immediately , but to bring the noise level to or below the anl by the date specified on the noise abatement notice
  条例并无规定各行业必须即时把噪音水平减至可接受的噪音声级，但必须于消减噪音通知书订明的日期前，将噪音水平减至可接受的噪音声级或更低水平。