30 UNITED NATIONS STANDARD MINIMUM RULES FOR THE TREATMENT OF PRISONERS 2. Where prisoners are employed in work not controlled by the prison administration, they shall always be under the supervision of prison staff. Unless the work is for other departments of the government, the full normal wages for such work shall be paid to the prison administration by the persons to whom the labour is supplied, account being taken of the output of the prisoners. Rule 101 1. The precautions laid down to protect the safety and health of free workers shall be equally observed in prisons. 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 workers. Rule 102 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 workers. 2. The hours so fixed shall leave one rest day a week and sufficient time for education and other activities required as part of the treatment and rehabilitation of prisoners. Rule 103 1. There shall be a system of equitable remuneration of the work of prisoners. 2. Under the system, prisoners shall be allowed to spend at least a part of their earnings on approved articles for their own use and to send a part of their earnings to their family. 3. The system should also provide that a part of the earnings should be set aside by the prison administration so as to constitute a savings fund to be handed over to the prisoner on his or her release. Education and recreation Rule 104 1. Provision shall be made for the further education of all prisoners capable of profiting thereby, including religious instruction in the countries where this is possible. The education of illiterate prisoners and of young