Is excessive any systems that constantly monitors employees or students, that is to say, to film both access to the establishment, the traffic and the places of life during business hours of the establishment, except in exceptional circumstances.
The obligation of information of the filmed person can be filled by mentioning it in the general conditions of inscription, a posting and the diffusion to the employees (note of information/ employment contract).
When the final purpose of the treatment is to protect goods and people (thefts, aggression, damage) and to avoid overflowing students, an adequate conservation period would be of one month.