English to Italian Law/Patents Law: Contract(s)

In un contratto di questo tipo, stipulato fra una società e le sue consociate con sede in altri paesi europei per creare una rete europea di spedizione merci a privati, MEMBER si traduce come : socio? PArtner? membro? affiliato?
1. Purpose
Each member provides a domestic network for parcel deliveries to private customers. With this agreement members and X create a cross- border network to offer to their customers a European -wide delivery of X2C parcels within a defined time-period of delivery.
3.3 The Network is made accessible to its Members.

Grazie ancora!