Clare County Council Requirements for giving statutory notice to the Commissioners of Public Works for the approval, construction & erection of headstones in Holy Island, Mountshannon. Requirements for the erection of headstones by the National Monuments act 1930 in Holy Island, Mountshannon, Co. Clare. Permission granted for the erection of headstones in Holy Island, Mountshannon by the Commissioners of Public Works. The erection of signage pursuant to the Commissioners of Public Works in Holy Island and Holy Island Car-park, Knockaphort, Mountshannon.