New Zealand Legislation: Regulations
Regulations are laws made under Acts
(1) The ambient air quality standard for a contaminant listed in the first column of the table in Schedule 1 is that the concentration of the contaminant must not exceed its threshold concentration except to the extent and in the circumstances (if any) listed in the third column of that table.
(2) For the purposes of these regulations, an ambient air quality standard is breached if the concentration of the contaminant concerned exceeds its threshold concentration otherwise than to the extent and in the circumstances (if any) listed in the third column of the table in Schedule 1.
(3) For the purposes of this regulation and Schedule 1, threshold concentration means the concentration of the contaminant listed in the second column of the table in Schedule 1 calculated over the time interval specified in that column.