68.Section 21 provides that an order under section 82(2) of the Environmental Protection Act 1990 may not be made by a magistrates' court in connection with noise emitted from premises, or from a vehicle, machinery and equipment in a street, where the nominated undertaker can show that they are used for Crossrail purposes and the Crossrail works concerned are being carried out in accordance with a notice or consent issued by the local authority under section 60, 61 or 65 of the Control of Pollution Act 1974. These provisions of the 1974 Act address control of noise on construction sites (section 60), consent for work on construction sites (section 61) and consent to exceed noise limits (section 65).