(1)Section 143 of this Act shall not apply to a vehicle owned by a person who has deposited and keeps deposited with the Accountant General of the Supreme Court the sum of £15,000, at a time when the vehicle is being driven under the owner's control.
(2)The said section 143 shall not apply—
(a)to a vehicle owned by the council of a county, county borough or county district in England or Wales, the Common Council of the City of London, the council of a London borough, the Greater London Council, a county, town or district council in Scotland, or by a joint board or joint committee in England or Wales, or joint committee in Scotland, which is so constituted as to include among its members representatives of any such council, at a time when the vehicle is being driven under the owner's control;
(b)to a vehicle owned by a police authority or the Receiver for the Metropolitan Police District, at a time when it is being driven under the owner's control, or to a vehicle at a time when it is being driven for police purposes by or under the direction of a constable, or by a person employed by a police authority, or employed by the said Receiver; or
(c)to a vehicle at a time when it is being driven on a journey to or from any place undertaken for salvage purposes pursuant to Part IX of the [1894 c. 60.] Merchant Shipping Act 1894;
(d)to the use of a vehicle for the purpose of its being furnished in pursuance of a direction under paragraph (b) of section 166(2) of the [1955 c. 18.] Army Act 1955 or under the corresponding provision of the [1955 c. 19.] Air Force Act 1955;
(e)to a vehicle owned by the London Transport Executive or by a body which is within the meaning of the [1969 c. 35.] Transport (London) Act 1969 (but disregarding section 51(5) of the [1968 c. 73.] Transport Act 1968) a wholly-owned subsidiary of that Executive, at a time when the vehicle is being driven under the owner's control.