When, under the foregoing provisions of this Act, a telegraph line or post has been placed by the telegraph authority under, over, along, across, in or upon any property vested in or under the control or management of a local authority, and the local authority, having regard to circumstances which have arisen since the telegraph line or post was so placed, considers it expedient that it should be removed or that its position should be altered, the local authority may require the telegraph authority to remove it or alter its position, as the case may be.