Principle XXIII - 1. Preventive measures
In accordance with international human rights law, appropriate and effective measures shall be adopted to prevent violence amongst persons deprived of liberty, or between persons deprived of liberty and the personnel.
In order to achieve that, the following measures shall be taken, amongst others:
a. Separate the different categories of persons deprived of liberty in conformity with the criteria set down in the present document;
b. Provide periodic and appropriate instruction and training for the personnel;
c. Increase the number of personnel in charge of internal security and surveillance, and set up continuous internal surveillance patterns;
d. Effectively prevent the presence of weapons, drugs, alcohol, and other substances and objects forbidden by law, by means of regular searches and inspections, and by using technological and other appropriate methods, including searches to personnel;
e. Set up early warning mechanisms to prevent crises or emergencies;
f. Promote mediation and the peaceful resolution of internal conflicts;
g. Prevent and combat all types of abuse of authority and corruption;
h. Eradicate impunity by investigating and punishing all acts of violence and corruption in accordance with the law.