or varied by a subsequent order so made . . . (4) The provisions of Schedule 1 to this Act shall apply to the . . . coming into operation of an order under this section. (5) In this Part of this Act a " noise abatement order " means an order made under this section. Annotations: Annotations are used to give authority for changes and other effects on the legislation you are viewing and to convey editorial information. They appear at the foot of the relevant provision or under the associated heading. Annotations are categorised by annotation type, such as F-notes for textual amendments and I-notes for commencement information (a full list can be found in the Editorial Practice Guide). Each annotation is identified by a sequential reference number. For F-notes, M-notes and X-notes, the number also appears in bold superscript at the relevant location in the text. All annotations contain links to the affecting legislation. 64 Register of noise levels. E+W+S (1) Every local authority which has designated its area or any part of its area a noise abatement zone shall measure the level of noise emanating from premises within the zone which are of any class to which the relevant noise abatement order relates. (2) The local authority shall record all measurements taken in pursuance of the preceding subsection in a register (in this Part of this Act referred to as a "noise level register") to be kept by the local authority for the purpose in accordance