4. Technical Memoranda (sections 9 to 12)

In relation to the construction noise permit system, the Ordinance introduces the concept of 'Technical Memoranda' which contain the technical principles to be applied in determining whether or not a permit should be issued and what conditions, if any, should be included in the permit. Three Technical Memoranda relevant to the construction noise provisions have been issued, namely the Technical Memorandum on Noise from Construction Work other than Percussive Piling (GW-TM), the Technical Memorandum on Noise from Construction Work in Designated Areas (DA-TM) and the Technical Memorandum on Noise from Percussive Piling (PP-TM).

Another Technical Memorandum for the Assessment of Noise from Places other than Domestic Premises, Public Places or Construction Sites (IND-TM) has also been issued. This contains the technical procedures that should be adopted by the Authority when investigating a complaint regarding noise emanating from industrial or commercial premises to determine whether or not a noise abatement notice should be issued.

All four Technical Memoranda came into operation in phases on the following dates after they were gazetted and laid on the table of the Legislative Council for the consideration by its members. Any amendments will have to follow the same procedure before they become legally effective.