(b)In particular, and without prejudice to the generality of the foregoing power, such rules may provide for all or any of the following matters, namely.-(i)the authorisation fee payable for the issue of a national permit;(ii)the fixation of the laden weight of the motor vehicle;(iii)the distinguishing particulars or marks to be carried or exhibited in or on the motor vehicle;(iv)the colour or colours in which the motor vehicle is to be painted;(v)any matter, not specified in this Act, which shall be borne in mind by the appropriate authority in granting a national permit.