66Traffic signs: modifications as respects cattle-grids.
(1)As respects traffic signs relating to a cattle-grid provided in England or Wales under the [1950 c. 24.] Highways (Provision of Cattle-Grids) Act 1950 or the [1959 c. 25.] Highways Act 1959 for a highway not being for the purposes of the said Act of 1959 a highway maintainable at the public expense, or to a by-pass so provided for use in connection with such a cattle-grid, " highway authority " in sections 55, 61, 62(1) and 63 of this Act shall include the council of the county comprising the rural district, the council of the borough, or the council of the urban district, as the case may be, in which the highway is situated.
(2)As respects traffic signs relating to a cattle-grid provided in Scotland under the Highways (Provisions of Cattle-Grids) Act 1950 for a road for the maintenance or management of which no highway authority is responsible, or to a by-pass provided for use in connection with such a cattle-grid, " highway authority " in the said sections 55, 61, 62(1) and 63 shall include the appropriate authority as defined by section 1(8)(b) of that Act.