19It should be pointed out in this respect that the insurance cover against occupational disease and accident provided for in Article 73 of the Staff Regulations and in the Rules on the insurance of officials of the European Communities against the risk of accident and of occupational disease (‘the Insurance Rules’) allows an injured official to be paid lump-sum compensation by the institution by which he is employed. That compensation is calculated on the basis of the rate of invalidity and the basic salary of the official, without any regard to the liability of the person responsible for the accident or that of the institution which laid down the working conditions that may have contributed towards the onset of the occupational disease.