substitute
(1) In this regulation:
"noise standard", for a noise zone, means the noise standard mentioned in the following provisions for the relevant zone and time:
(a) for a zone other than zones B1 and C1—schedule 2, table 2.2, column 3 or column 4;
(b) for zone B1—schedule 2, table 2.2A, column 3 or column 4;
(c) for zone C1—schedule 2, table 2.2B, column 3 or column 4.