In reply to MG:
It's been badly translated into English, the slightly clearer French version says "Il s’agit d’un abonnement valable pour 10 passages à effectuer au cours d’une période de 24 mois consécutifs en plus du mois de validation."
This means 10 trips over a maximum of 24 months, with the 24-month period starting the month after you first use it.
I don't think the tickets are linked to a reg number but I'm not completely sure.