7.(1) The Government may make rules to carry out the purposes and objects of this Act.(2) In particular and without prejudice to the generality of the foregoing power, the Government may make rules providing for the form of passes to be given to persons or bodies of persons or in respect of property entitled to exemption from the payment of tolls under this Act.(3) The power to make rules under this section is subject to the condition of the rules being made after previous publication.(4) All rules made under this section shall be published in the official Gazette and, on such publication, shall have effect as if enacted by this Act.