In 2021, CESP carried out, for the first time, the audit of the reference study of the Cinema media, CinExpert. This study, carried out, by Vertigo Institute, is used by the advertising sales houses which sell advertising in cinemas. The audience measurement system is composed of an annual etablishment survey and weekly studies in order to define the spectators od the programmed films. This measurement service will be regularly audited by CESP.