(1) The Chief Executive Officer may, by order in writing, permit the temporary occupation of any street, or of any land vested in the Board, for the purpose of depositing any building materials or making any temporary excavation therein or erection thereon, subject to such conditions as the Board may prescribe for the safety or convenience of the public, and may charge a fee for such permission and may in his discretion withdraw such permission.
     (2) Where any article or thing is placed on any street or land under the management of the Board or the Defence Estates Officer so as to form an obstruction thereto or any encroachment thereon, the Chief Executive Officer or, as the case may be, the Defence Estates Officer, may cause such article or thing to be removed and recover from the person who placed such article or thing the expenses incurred in that behalf in the same manner as moneys recoverable by the Board under section 324 and may also, if such person fails to offer satisfactory explanation, order the confiscation of such article or thing.