Runway incursion or obstructed runway

    In the event the aerodrome controller, after a take off clearance or a landing clearance has been issued,become aware of a runway incursion or a imminient occurence thereof,of the existence of any obstruction or on in close proximity to the runway likely to impair the safety of an aircraft taking of or landing,appropriate action shall be taken as follows :
    A.Cancel the take off clearance fo a departing aircraft.
    B.Instruct a landing aircraft to execute a go arround or missed approach .
     C.In all casses inform the aircraft of the runway incursion or obstruction and its oocation in relation to the runway .

    Pilot and controllers shall report any occurance involving an obstruction on the runway or a runway incursion.