4.  The person giving the notice shall give to the Commissioners such security or further security within such time and in such manner, whether by deposit of a sum of money or guarantee, as the Commissioners may require, in respect of any liability or expense which they may incur in consequence of the notice by reason of the detention of any goods or anything done to goods so detained: and if such security or further security is not given within the time specified by the Commissioners, then (but without prejudice to the operation of regulation 5 below) the notice shall have no effect.