The project has been planned so as to address in priority a public of Competent Authorities' staff in charge of the design and implementation of the National Residues Control Plans, official staff in charge of veterinary medicinal products at all stages of the chain, from production to use, official staff in charge of sampling and analysis linked with the topic and possibly staff of official laboratories. With a view not to recall the basic elements of the legislation, but with the objective to provide opportunities for discussion and exchanges of views on specific elements of the legislation using examples and real cases observation.