To attend the next edition of the International Fair for Managing the New, Safe, Sustainable Mobility, you can register on the Fair's website any time before its closing day 11th October. But before it opens on October 8th you can register for free (entrance during the Fair costs €15).
As a pre-registered attendee, you can sign up for updates on the workshops, activities, forums, presentations and talks during the Fair. So you can schedule your agenda for the Fair well in advance.
To pre-register, log in at: https://seguro.ifema.es/ControlUsuarios/login.htm?idioma=es&url=REGN_ES_TRPRI19