Section 4

the Chief Police Officer or the Officer in Charge of a Police District may by order or by giving directions or in any other manner he thinks fit regulate, restrict, control or prohibit the use of any road, street, path or waterway or any public place or close any road, street, path,waterway or public place to the public or any class of the public or to any vehicle or vessel or class of vehicle or vessel;

if it appears to the senior police officer present in any part of any such area that, in order to restore or maintain public order in the place, it is necessary to regulate, restrict, control or prohibit the use of any road, street, path or waterway or any public place in or giving access to the part or to close any such road, street, path, waterway or public place and that the situation is too urgent to communicate with an officer having authority under paragraph (a) the officer may exercise the powers conferred by that paragraph on the Chief Police Officer or the Officer in Charge of a Police District:

Provided that the powers conferred by paragraph (b) shall not be exercised by a police officer below the rank of Sergeant:

And provided that no order under paragraph (b) shall be valid after the expiration of a period of twenty-four hours from the time when it was made unless made or confirmed by the Chief Police Officer or the Officer in Charge of the Police District having authority under paragraph (a).

Prohibition and dispersal of assemblies