11 68. So far as possible separate institutions or separate sections of an institution shall be used for the treatment of the different classes of prisoners. 69. As soon as possible after admission and after a study of the personality of each prisoner with a sentence of suitable length, a programme of treatment shall be prepared for him in the light of the knowledge obtained about his individual needs, his capacities and dispositions. Privileges 70. Systems of privileges appropriate for the different classes of prisoners and the different methods of treatment shall be established at every institution, in order to encourage good conduct, develop a sense of responsibility and secure the interest and co-operation of the prisoners in their treatment. Work 71. (1) Prison labour must not be of an afflictive nature. (2) All prisoners under sentence shall be required to work, subject to their physical and mental fitness as determined by the medical officer. (3) Sufficient work of a useful nature shall be provided to keep prisoners actively employed for a normal working day. (4) So far as possible the work provided shall be such as will maintain or increase the prisoners, ability to earn an honest living after release. (5) Vocational training in useful trades shall be provided for prisoners able to profit thereby and especially for young prisoners. (6) Within the limits compatible with proper vocational selection and with the requirements of institutional administration and discipline, the prisoners shall be able to choose the type of work they wish to perform. 72. (1) The organization and methods of work in the institutions shall resemble as closely as possible those of similar work outside institutions, so as to prepare prisoners for the conditions of normal occupational life. (2) The interests of the prisoners and of their vocational training, however, must not be subordinated to the purpose of making a financial profit from an industry in the institution. 73. (1) Preferably institutional industries and farms should be operated directly by the administration and not by private contractors. (2) Where prisoners are employed in work not controlled by the administration, they shall always be under the supervision of the institution's personnel. Unless the work is for other departments of the government the full normal wages for such work shall be paid to the administration by the persons to whom the labour is supplied, account being taken of the output of the prisoners. 74. (1) The precautions laid down to protect the safety and health of free workmen shall be equally observed in institutions. (2) Provision shall be made to indemnify prisoners against industrial injury, including occupational disease, on terms not less favourable than those extended by law to free workmen. 75. (1) The maximum daily and weekly working hours of the prisoners shall be fixed by law or by administrative regulation, taking into account local rules or custom in regard to the employment of free workmen.