It was necessary to obtain written permission from the Department of Civil Aviation to carry out a display jump and as most showgrounds were surrounded by suburbia the Department was loath to give permission for higher altitude jumps at these displays.   In fact the "bomburst" tracking displays at airshows with the jumpers landing on the piano keys at each end of the airstrip and two other nominated points, were Claude's way of showing Department officials that parachutists could have control over where they landed.    Eventually after viewing film of American jumpers landing in car parks at an Instructor Conference in  Melbourne and an invitation to Devonshire Tea on the Gatehouse veranda to view (unexpectedly) the Golden Eagles jumping into the front garden, the Department took a more lenient view of display jumping approvals.