The Austrian law of November 19^{th} 1887, the complement of the law of May 28^{th} 1882, has laid this down. This condition is bound up with the liberty and spontaneity which ought to characterise the association; nothing can oblige the depositors in the Savings Bank to give their adhesion to this service, to run the risks, small though they be, of these operations, to submit to the working out of its special conditions. Its utility ought to be freely appreciated and the Savings Bank will on the other hand have to fix the regulations which the adherents must satisfy. Thus those affiliated to the service will not be necessarily confounded with the whole mass of the depositors in the Savings Bank. In carrying out this law it will be necessary to fix a minimum deposit enabling anyone to become a participant in the institution and to have an account; and until the withdrawal of the depositor he will not be able to dispose of this sum; this is the fundamental guarantee the Austrian law imposes and it is a legitimate one: the risks are in other respects insignificant; however it is wise to render this guarantee complete by the formation of a reserve fund; all those who adhere to the service will participate in it; the mode of its formation, and the amount will be fixed by subsequent ordinances. Thus the stability of the institution will be completely assured. Free to adhere to the service, the depositor ought to be free to withdraw from it, only the regulations will have if this occurs, to determine the consequences of withdrawal, from the point of view of responsibility. The working of the system absolutely requires the complete centralisation of the accounts of the adherents. The account-books ought to be preserved as well as the accounts kept at the central office of the Savings Bank. What enlargement will be required in number of persons employed must be left to the future. This centralisation is the absolute condition of the regularity of the entries, the certainty of the control and of the preservation against error and fraud; without it the transferring of the entries and of the clearing could not be carried out; by it alone the exact state of the balance of every adherent can be known at any moment; by it alone exact information can be had at each operation of the situation and consequently of the extent of the capital which can be disposed of. The secret of the way in which the surplus is employed will moreover be kept from the knowledge of outsiders. Experience has proved that the central service of bookkeeping can, without any disturbance, be placed every day in relation with all the post-offices, and the accounts be kept to date notwithstanding the apparent inextricable complexity of all this correspondence and of all these various operations.