Runways
As i recall when we licensed Perranporth (normal RAF size runways) we would have had to 'improve both grass edges to a point that an aircraft could 'run off' without collapsing is legs.As one side was under plough we went for an 'inset offset lic runway with one grass edge and the other usable tarmac. This left a wide band on one side however it was still part of the 'safety strip' therefore could not be obstructed.We also improved the grass edged part to form an unlicensed grass strip 600m x 15m. If we had not needed the lic we could just operate as we wished to suit our own needs. I suggest that an aircraft taxying or holding on the safety strip would constitute an obstacle therefore the lic would be void at that time.If the landing machine did not require a lic runway then this would not preclude its use.Despite providing 2x lic tarmac and 1x ul tarmac runway plus 3 smooth grass strips some visitors still complained about a landing fee and then of course we still had to battle with the local Council just to stay open.Ah the joys of GA;and i have to say that during all this the CAA lic dept were a pleasure to deal with and a constant help to defeat the bad guys at Carrick Dis Council.